Tamilnadu Board Chemistry State Board (Tamilnadu) for 12th Standard (English Medium) Question paper & Study Materials

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How do concentrations of the reactant influence the rate of reaction?

  • 2)

    The rate constant for a first order reaction is 1.54 x 10-3 s-1. Calculate its half life time.

  • 3)

    The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?

  • 4)

    The activation energy of a reaction is 22.5 k Cal mol-1 and the value of rate constant at 40°C is 1.8 x 10-5s-1. Calculate the frequency factor, A.

  • 5)

    The rate constant of a reaction at 400 and 200K are 0.04 and 0.02 s-1 respectively. Calculate the value of activation energy.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Ksp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO3

  • 2)

    Write the expression for the solubility product of Hg2Cl2 .

  • 3)

    Will a precipitate be formed when 0.150 L of 0.1M Pb(NO3)2 and 0.100L of 0.2 M NaCl are mixed? \(K_{sp}\ (PbCl_{2})=1.2\times10^{-5}\).

  • 4)

    What is the pH of an aqueous solution obtained by mixing 6 gram of acetic acid and 8.2 gram of sodium acetate and making the volume equal to 500 ml. (Given: Ka for acetic acid is  \(1.8\times10^{-5}\))

  • 5)

    Establish a relationship between the solubility product and molar solubility for the following
    a) BaSO
    b) Ag2(CrO4)

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Solubility product of Ag2CrO4 is \(1\times10^{-12}\). What is the solubility of Ag2CrO4 in 0.01M AgNO3 solution?

  • 2)

    A saturated solution, prepared by dissolving CaF2(s) in water, has \([Ca^{2+}]=3.3\times10^{-4}M\). What is the Ksp of CaF2?

  • 3)

    A particular saturated solution of silver chromate Ag2CrO4 has \([Ag^{+}]=5\times10^{-5}\) and \([CrO_{4}]^{2-}=4.4\times10^{-4}M\). What is the value of Ksp for Ag2 CrO4?

  • 4)

    Ksp of Ag2CrO4 is \(1.1\times10^{-12}\). What is solubility of Ag2CrO4 in 0.1M K2CrO4.

  • 5)

    Ksp of Al(OH)3 is 1\(\times\)10-15M. At what pH does 1.0×10-3M Al3+ precipitate on the addition of buffer of NH4Cl and NH4OH solution?

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    In fuel cell Hand O2 react to produce electricity. In the process, H2 gas is oxidised at the anode and O2 at cathode. If 44.8 litre of H2 at 250C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu2+, how many grams of Cu deposited?

  • 2)

    A copper electrode is dipped in 0.1M copper sulphate solution at 25oC. Calculate the electrode potential of copper. [Given: E0Cu2+|Cu = 0.34V].

  • 3)

    9.2\(\times\)1012 litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)106 Cs−1 at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.

  • 4)

    Write a note on sacrificial protection.

  • 5)

    Ionic conductance at infinite dilution of Al3+ and SO4 2- are 189 and 160 mho cm2 equiv-1. Calculate the equivalent and molar conductance of the electrolyte Al2(SO4)3 at infinite dilution.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    In fuel cell Hand O2 react to produce electricity. In the process, H2 gas is oxidised at the anode and O2 at cathode. If 44.8 litre of H2 at 250C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu2+, how many grams of Cu deposited?

  • 2)

    A copper electrode is dipped in 0.1M copper sulphate solution at 25oC. Calculate the electrode potential of copper. [Given: E0Cu2+|Cu = 0.34V].

  • 3)

    9.2\(\times\)1012 litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)106 Cs−1 at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.

  • 4)

    Write a note on sacrificial protection.

  • 5)

    Ionic conductance at infinite dilution of Al3+ and SO4 2- are 189 and 160 mho cm2 equiv-1. Calculate the equivalent and molar conductance of the electrolyte Al2(SO4)3 at infinite dilution.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Why does bleeding stop by rubbing moist alum

  • 2)

    Comment on the statement: Colloid is not a substance but it is a state of substance.

  • 3)

    Write a note on electro osmosis.

  • 4)

    Explain intermediate compound formation theory of catalysis with an example.

  • 5)

    Describe adsorption theory of catalysis

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What will be the product (X and A) for the following reaction acetylchloride \(\frac{\text { i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { ii) } \mathrm{H}_{3} \mathrm{O}^{+}}{\longrightarrow} \mathrm{X} \stackrel{\text { acid } \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\longrightarrow}\) 

  • 2)

    Predict the product A,B,X and Y in the following sequence of reaction

  • 3)

    Phenol is distilled with Zn dust followed by friedel – crafts alkylation with prophyl chloride to give a compound B, B on oxidation gives (c) Indentify A,B and C.

  • 4)

    Complete the following reactions 
    i) CH3- CH2 - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\)  A  \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
    ii) C6H5- OH  \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C

  • 5)

    An organic compound (A) molecular formula CH2O reacts with CH3MgI to give compound (B). Compound (B) liberates Hydrogen with metallic sodium. Compound (B) in the presence of Con. H2SO4 at 410 K on dehydration to give compound (C) molecular formula C4H10O. Identify (A), (B) and (C). Explain the above reactions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How will you convert acetylene into n-butyl alcohol.

  • 2)

    Complete the following reactions

    ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

  • 3)


    Identify A,B,C,D and write the complete equation

  • 4)

    0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm3 of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.

  • 5)

    An organic compound (A) of molecular formula C6H6O gives violet colour with neutral FeCI3. (A) gives maximum of two isomers (B) and (C) when an alkaline solution of (A) is refluxed with CCI4 (A) also reacts with C6H5N2CI to give the compound (D) which is red orange dye. Identify (A), (B), (C) and (D). Explain with suitable chemical reactions.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.

  • 2)

    How are the following conversions effected
    (a) propanal into butanone
    (b) Hex-3-yne into hexan-3-one.
    (c) phenylmethanal into benzoic acid
    (d) phenylmethanal into benzoin

  • 3)

    Complete the following reaction
    \({ CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 }\overset { HO-{ CH }_{ 2 }-{ CH }_{ 2 }-OH }{ \underset { { dry }{ HCl} }{ \longrightarrow } } ?\)

  • 4)

    Identify A, B and C

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How will you convert diethylamine into
    i) N, N – diethylacetamide
    ii) N – nitrosodiethylamine

  • 2)

    Identify A,B and C
    \(\overset{SOCl_2}\longrightarrow A \overset{NH_3}\longrightarrow B\overset{LiAlH_4}\longrightarrow (C)\)

  • 3)

    Complete the following reaction

  • 4)

    Predict A,B,C and D for the following reaction

  • 5)

    Identify A to E in the following sequence of reactions
       
     \(\overset { {CH_3} {CL} }{ \underset { {AlCl}_3 }{ \longrightarrow } }\) A \(\overset { {HNO_3}/ {H_2So_4} }{ \underset { {} }{ \longrightarrow } }\)  B \(\overset { {Sn} /{HCL} }{ \underset {{} }{ \longrightarrow } }\)  (C) \(\overset { {NaNo_2}/ {HCL} }{ \underset { {O^o}C }{ \longrightarrow } }\)  D \(\overset { {CuCN} }{ \underset { {}}{ \longrightarrow } }\) E

12th Standard English Medium Chemistry Subject Biomolecules Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Define enzymes

  • 2)

    Write the structure of α-D (+) glucophyranose

  • 3)

    What are different types of RNA which are found in cell

  • 4)

    Write a note on formation of α-helix .

  • 5)

    What are the functions of lipids in living organism.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are anti fertility drugs? Give examples.

  • 2)

    What are bio degradable polymers? Give examples.

  • 3)

    Write a note on vulcanization of rubber

  • 4)

    Differentiate thermoplastic and thermosetting.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are narcotic and non – narcotic drugs. Give examples

  • 2)

    Write a note on co –polymer

  • 3)

    How is terylene prepared?

  • 4)

    Classify the following as linear, branched or cross linked polymers
    a) Bakelite
    b) Nylon-6,6
    c) polythene (HDPE) 
    d) polythene (LDPE)

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Roasting of sulphide ore gives the gas (A).(A) is a colourless gas. Aqueous solution of (A) is acidic. The gas (A) is______.

  • 2)

    The following set of reactions are used in refining Zirconium 
    \(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
    \({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.

  • 3)

    In diborane, the number of electrons that accounts for banana bonds is ________.

  • 4)

    Which is true regarding nitrogen?

  • 5)

    Which of the following does not give oxygen on heating?

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which of the metal is extracted by Hall-Heroult process?

  • 2)

    Which of the following reduction is not thermodynamically feasible?

  • 3)

    Duralumin is an alloy of ______.

  • 4)

    Which of the following is strongest acid among all?

  • 5)

    The catalytic behaviour of transition metals and their compounds is ascribed mainly due to _______.

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What is the role of quick lime in the extraction of Iron from its oxide Fe2O3?

  • 2)

    What is catenation ? describe briefly the catenation property of carbon.

  • 3)

    Explain why fluorine always exhibit an oxidation state of -1?

  • 4)

    Justify the position of lanthanoids and actinoids in the periodic table.

  • 5)

    Write the IUPAC names for the following complexes.

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are the differences between minerals and ores?

  • 2)

    Write a note on Fisher tropsch synthesis.

  • 3)

    Chalcogens belongs to p-block. Give reason.

  • 4)

    Why Gd3+ is colourles?

  • 5)

    Arrange the following in order of increasing molar conductivity
    (i) Mg[Cr(NH3)(Cl)5]
    (ii) Cr(NH3)5Cl]3[CoF6]2
    (iii) [Cr(NH3)3Cl3]

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain the electrometallurgy of aluminium.

  • 2)

    Describe the structure of diborane.

  • 3)

    Give a reason to support that sulphuric acid is a dehydrating agent.

  • 4)

    Explain the variation in E0M3+/M2+  3d series.

  • 5)

    Classify the following ligands based on the number of donor atoms.
    a) NH3
    b) en
    c) ox2-
    d) pyridine

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain the following terms with suitable examples.
    (i) Gangue
    (ii) slag

  • 2)

    AlCl3 behaves like a lewis acid. Substantiate this statement.

  • 3)

    How will you prepare chlorine in the laboratory?

  • 4)

    Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

  • 5)

    What is linkage isomerism? Explain with an example.

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain the principle of electrolytic refining with an example.

  • 2)

    Write a note on zeolites.

  • 3)

    Give two equations to illustrate the chemical behaviour of phosphine.

  • 4)

    Which is stronger reducing agent Cr2+ or Fe2+?

  • 5)

    What is crystal field stabilization energy (CFSE)?

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

  • 2)

    How will you convert boric acid to boron nitride?

  • 3)

    Give a reaction between nitric acid and a basic oxide.

  • 4)

    The E0M2+/M value for copper is positive. Suggest a possible reason for this.

  • 5)

    A solution of [Ni(H2O)6]2+ is green, whereas a solution of [Ni(CN)4]2- is colorless -Explain

12th Standard Chemistry English Medium Metallurgy Important Questions updated Sample Question Papers - by Question Bank Software View & Read

  • 1)

    Which of the metal is extracted by Hall-Heroult process?

  • 2)

    Which of the following is not true with respect to Ellingham diagram?

  • 3)

    Concentration of copper glance is done by________.

  • 4)

    Steel is an alloy of___________

  • 5)

    Which of these is not a monomer for a high molecular mass silicone polymer?

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Bauxite has the composition ______.

  • 2)

    Which one of the following reaction represents calcinations?

  • 3)

    Which of the metal is extracted by Hall-Heroult process?

  • 4)

    Match items in column - I with the items of column – II and assign the correct code.

           Column-I      Column-II
    A. Cyanide process (i) Ultrapure Ge
    B Froth floatation process (ii) Dressing of ZnS
    C Electrolytic reduction (iii) Extraction of Al
    D Zone refining (iv) Extraction of Au
        (v) Purification of Ni
  • 5)

    Which one of the following is not feasible

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which one of the following ores is best concentrated by froth – floatation method?

  • 2)

    Zinc is obtained from ZnO by________.

  • 3)

    Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by_______.

  • 4)

    The following set of reactions are used in refining Zirconium 
    \(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
    \({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.

  • 5)

    The incorrect statement among the following is______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    An aqueous solution of borax is________.

  • 2)

    Which among the following is not a borane?

  • 3)

    In diborane, the number of electrons that accounts for banana bonds is ________.

  • 4)

    Carbon atoms in fullerene with formula C60 have _______hybridisation.

  • 5)

    The basic structural unit of silicates is _______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which of the following is not sp2 hybridised?

  • 2)

    Which of the following statements is not correct?

  • 3)
      Column-I     Column-II
    A Borazole 1 B(OH)3
    B Boric acid 2 B3N3H6
    C Quartz 3 Na2[B4O5(OH)4]8H2O
    D Borax 4 SiO2
  • 4)

    Thermodynamically the most stable form of carbon is________.

  • 5)

    The stability of +1 oxidation state increases in the sequence ________.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which is true regarding nitrogen?

  • 2)

    Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

  • 3)

    On hydrolysis, PCl3 gives________.

  • 4)

    The basicity of pyrophosphorous acid ( H4P2O5) is _______.

  • 5)

    Assertion: Bond dissociation energy of fluorine is greater than chlorine gas
    Reason: Chlorine has more electronic repulsion than fluorine.
    Codes:
    a) Both assertion and reason are true and reason is the correct explanation of assertion.
    b) Both assertion and reason are true but reason is not the correct explanation of assertion
    c) Assertion is true but reason is false
    d) Both assertion and reason are false

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    An element belongs to group 15 and 3rd period of the periodic table, its electronic configuration would be_______.

  • 2)

    Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

  • 3)

    In the brown ring test, brown colour of the ring is due to _______.

  • 4)

    On hydrolysis, PCl3 gives________.

  • 5)

    P4O6 reacts with cold water to give _______.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The alloy of copper that contain Zinc is________.

  • 2)

    Which of the following does not give oxygen on heating?

  • 3)

    In acid medium, potassium permanganate oxidizes oxalic acid to _______.

  • 4)

    Which of the following statements is not true?

  • 5)

    Permanganate ion changes to ________ in acidic medium.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The number of moles of acidified KMnO4 required to oxidize 1 mole of ferrous oxalate(FeC2O4) is _______.

  • 2)

    When a brown compound of Mn (A) is treated with HCl, it gives a gas (B). The gas (B) taken in excess reacts with NH3 to give an explosive compound (C). The compound A, B and C are ________.

  • 3)

    Which one of the following statements related to lanthanons is incorrect?

  • 4)

    Which of the following lanthanoid ions is diamagnetic?

  • 5)

    Which of the following oxidation states is most common among the lanthanoids?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    An excess of silver nitrate is added to 100ml of a 0.01M solution of pentaaquachloridochromium(III)chloride. The number of moles of AgCl precipitated would be _______.

  • 2)

    A complex has a molecular formula MSO4Cl.6H2O. The aqueous solution of it gives white precipitate with Barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution. If the secondary valence of the metal is six, which one of the following correctly represents the complex?

  • 3)

    Oxidation state of Iron and the charge on the ligand NO in [Fe(H2O)5NO]SO4 are_______.

  • 4)

    As per IUPAC guidelines, the name of the complex [Co(en)2(ONO)Cl]Cl is _______.

  • 5)

    IUPAC name of the complex K3[Al(C2O4)3] is _______.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    A complex in which the oxidation number of the metal is zero is_______.

  • 2)

    Formula of tris(ethane-1, 2-diamine)iron(II)phosphate _______.

  • 3)

    Which of the following is paramagnetic in nature?

  • 4)

    Fac-mer isomerism is shown by _______.

  • 5)

    Choose the correct statement.

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Graphite and diamond are ________.

  • 2)

    An ionic compound Ax By crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube the correct formula of AxBy is ________.

  • 3)

    The ratio of close packed atoms to tetrahedral hole in cubic packing is ________.

  • 4)

    Solid CO2 is an example of ________.

  • 5)

    Assertion: monoclinic sulphur is an example of monoclinic crystal system
    Reason: for a monoclinic system, \(a\neq b\neq c\) and \(\alpha =\gamma ={ 90 }^{ 0 },\beta \neq { 90 }^{ 0 }\) 
    Codes:
    a) Both assertion and reason are true and reason is the correct explanation of assertion
    b) Both assertion and reason are true but reason is not the correct explanation of assertion.
    c) Assertion is true but reason is false.
    d) Both assertion and reason are false.

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    If ‘a’ is the length of the side of the cube, the distance between the body centered atom and one corner atom in the cube will be_________.

  • 2)

    Potassium has a bcc structure with nearest neighbor distance 4.52 \(\overset{o}{A}\). Its atomic weight is 39. its density will be_______.

  • 3)

    Schottky defect in a crystal is observed when ______.

  • 4)

    Assertion: due to Frenkel defect, density of the crystalline solid decreases.
    Reason: In Frenkel defect cation and anion leaves the crystal.
    Codes:
    a) Both assertion and reason are true and reason is the correct explanation of assertion
    b) Both assertion and reason are true but reason is not the correct explanation of assertion
    c) Assertion is true but reason is false
    d) Both assertion and reason are false

  • 5)

    A two dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y respectively. The simplest formula for the compound based on the unit cell from the pattern is _______.

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2022 updated Previous Year Question Papers - by QB Admin View & Read

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    For a first order reaction A ⟶ B the rate constant is x min−1. If the initial concentration of A is 0.01M, the concentration of A after one hour is given by the expression.

  • 2)

    Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behavior over the entire temperature range is _______.

  • 3)

    For the reaction, 2NH3 ⟶ N2 + 3H2, if \(\frac { -d[NH_{ 3 }] }{ dt } \) = k1[NH3], \(\frac { d[N_{ 2 }] }{ dt } =k_{ 2 }[NH_{ 3 }],\frac { d[{ H }_{ 2 }] }{ dt } \)= k3[NH3] then the relation between k1, k2 and k3 is _________.

  • 4)

    For a reaction Rate = k[acetone]3/2 then unit of rate constant and rate of reaction respectively is _______.

  • 5)

    Consider the following statements:
    (i) increase in concentration of the reactant increases the rate of a zero order reaction.
    (ii) rate constant k is equal to collision frequency A if Ea = 0
    (iii) rate constant k is equal to collision frequency A if Ea = ∞
    (iv) a plot of ln (k) vs T is a straight line.
    (v) a plot of ln (k) vs \(\left( \frac { 1 }{ T } \right) \) is a straight line with a positive slope.
    Correct statements are

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2022 updated Previous Year Question Papers - by QB Admin View & Read

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    In a homogeneous reaction A⟶B+C+D, the initial pressure was P0 and after time t it was P expression for rate constant in terms of P0, P and t will be _____.

  • 2)

     If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be completed in_______.

  • 3)

    The correct difference between first and second order reactions is that________.

  • 4)

    After 2 hours, a radioactive substance becomes \(\left( \frac { 1 }{ 16 } \right) ^{ th }\) of original amount Then the half life (in min) is _______.

  • 5)

    This reaction follows first order kinetics. The rate constant at particular temperature is 2.303 x 10-2 hour-1. The initial concentration of cyclopropane is 0.25 M. What will be the concentration of cyclopropane after 1806 minutes? (log 2 = 0.3010)

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2022 updated Previous Year Question Papers - by QB Admin View & Read

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The solubility of BaSO4 in water is 2.42 × 10-3gL-1 at 298K. The value of its solubility product(Ksp) will be (Given molar mass of BaSO4 =233g mol-1)

  • 2)

    pH of a saturated solution of Ca(OH)2 is 9. The Solubility product (Ksp) of Ca(OH)2 _______.

  • 3)

    Conjugate base for Bronsted acids H2O and HF are _______.

  • 4)

    Which will make basic buffer?

  • 5)

    Which of the following fluro compounds is most likely to behave as a Lewis base?

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2022 updated Previous Year Question Papers - by QB Admin View & Read

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    H2PO4- the conjugate base of _______.

  • 2)

    Which of the following can act as Lowery – Bronsted acid well as base?

  • 3)

    The pH of an aqueous solution is Zero. The solution is _______.

  • 4)

    The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by _______.

  • 5)

    Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)
    Electrolyte KCl KNO3 HCl NaOAC NaCl
    Λ-
    (Scm2 mol-1)
    149.9 145.0 426.2 91.0 126.5

    Calculate ΛoHoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25oC_______.

  • 2)

    Faraday constant is defined as_______.

  • 3)

    How many faradays of electricity are required for the following reaction to occur MnO4-→ Mn2+

  • 4)

    A current strength of 3.86 A was passed through molten Calcium oxide for 41 minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode is_______. (atomic mass of Ca is 40g / mol and 1F = 96500C).

  • 5)

    During electrolysis of molten sodium chloride, the time required to produce 0.1mole of chlorine gas using a current of 3A is _____.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    In the electrochemical cell: Zn|ZnSO4 (0.01M)|| CuSO4 (1.0M)|Cu, the emf of this Daniel cell is E1. When the concentration of ZnSO4 is changed to 1.0M and that CuSO4 changed to 0.01M, the emf changes to E2. From the above, which one is the relationship between E1 and E2?

  • 2)

    Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below:
    \({ BrO }_{ 4 }^{ - }\overset { 1.82V }{ \longrightarrow } { BrO }_{ 3 }^{ - }\overset { 1.5V }{ \longrightarrow } HBrO\overset { 1.595v }{ \longrightarrow } { Br }_{ 2 }\overset { 1.0652V }{ \longrightarrow } Br^{ - }\)
    Then the species undergoing disproportional is

  • 3)

    For the cell reaction
    2Fe3+(aq) + 2l(aq) \(\rightarrow\)2Fe2+ (aq) + 12 (aq)
    Eocell = 0.24V  = at 298K. The standard Gibbs energy (Δ, Go) of the cell reactions is:

  • 4)

    A certain current liberated 0.504gm of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution ______.

  • 5)

    A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY- and 1MZ- at 25oC. If the reduction potential of Z>Y>X, then_____.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?

  • 2)

    Hair cream is _____.

  • 3)

    Which one of the following is correctly matched?

  • 4)

    The most effective electrolyte for the coagulation of As2S3Sol is _______.

  • 5)

    Which one of the is not a surfactant?

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which one of the is not a surfactant?

  • 2)

    The phenomenon observed when a beam of light is passed through a colloidal solution is_______.

  • 3)

    In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K2SO4
    (i), Na3 PO4
    (ii), K4 [Fe(CN)6]
    (iii) and NaCl
    (iv) Their coagulating power should be

  • 4)

    Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?

  • 5)

    Which one of the following is an example for homogeneous catalysis?

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Name some common methods of ore concentration.

  • 2)

    Name some reducing agents used to convert Metal oxides to metal

  • 3)

    Name the various refining process.

  • 4)

    Why are sulphide ores converted to oxide form before reduction to metal?

  • 5)

    Write the two similarities between calcination and roasting.

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is the role of graphite rods in the electro metallurgy of aluminium?

  • 2)

    Name and discuss the principle involved in obtaining silicon of high purity.

  • 3)

    Give reason : Extraction of copper directly from sulphide ores is less favourable than from its oxide ores through reduction.

  • 4)

    Define metallurgy.

  • 5)

    Define roasting.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain the formation of boron trifluoride.

  • 2)

    Mention the physical properties of boranes.

  • 3)

    What are the uses of boron trifluoride?

  • 4)

    What is burnt alum?

  • 5)

    What is phosgene? How is it prepared?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What are the uses of silicon tetra chloride?

  • 2)

    What is inert pair effect?

  • 3)

    Name the building block of zeolites. Why zeolites have high porosity?

  • 4)

    Name the two important ores of Boron.

  • 5)

    Which one is more soluble in diethyl ether, anhydrous Alcl3 or hydrated Alcl3? Explain in terms of bonding.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Give two uses of nitric acid.

  • 2)

    What is the reaction of Phosphorous with alkali?

  • 3)

    Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?

  • 4)

    (i) Give correct order of boiling point of hydride of group 17.
    (ii) Fluorine exhibits only -1 oxidation state whereas other halogens show +1, +3, +5 and +7 oxidation state also Explain.

  • 5)

    There is a huge difference between the melting and boiling points of oxygen and sulphur. Why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How is SO2 an air pollutant?

  • 2)

    Give the reason for bleaching action of Cl2.

  • 3)

    Arrange the following as indicated below:
    (i) F2, Cl2, Br2, I2 - increasing bond dissociation enthalpy.
    (ii) HF, HCI, HBr, HI - increasing acidic strength.

  • 4)

    Explain Why inspite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not - Give reason.

  • 5)

    (i) Nitric oxide becomes brown when released in air. Why?
    (ii) BiCl3 is more stable than BiCl3, Why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Why Zn2+ salts are white while Ni2+ salts are coloured?

  • 2)

    Silver atom has completely filled d-orbitals (4d10) in its ground state. How can you say that it is a transition element?

  • 3)

    What happens when KMnO4 is treated with KI?

  • 4)

    Orange colour of Cr2O72- ion charges to yellow in alkali and yellow solution turns out orange on adding H+ ions. Explain why?

  • 5)

    Many industrial processes use transition metal or their compounds as catalyst. Why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is hydroformylation of olefins?

  • 2)

    What is Zeigler - Natta catalyst?

  • 3)

    What are the conditions for alloy formation?

  • 4)

    Draw the structure of permanganate ion.

  • 5)

    What is Bayer's reagent?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is the coordination number of central metal ion in [Fe(C2O4)3]3-?

  • 2)

    Write the IUPAC name of the complex.

  • 3)

    Define 'Ligand' Give an example of nautral legand.

  • 4)

    Write the IUPAC name of [Ag(NH3)2]Cl.

  • 5)

    Give the chemical formula of potassium trioxalato ferrate(III}

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Identify the ligand and the central metal in the Co-ordination compound. [Co(NH3)4Cl6]CI

  • 2)

    What are Co-ordination isomers? Give examples

  • 3)

    What are stereoisomers?

  • 4)

    What is facial isomer?

  • 5)

    Give the two isomers of Co2(CO)8.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The X is _______.

  • 2)

    In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.

  • 3)

    Which one of the following is the strongest acid.

  • 4)

    on treatment with Con H2SO4, predominately gives______.

  • 5)

    Carbolic acid is _____.

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?

  • 2)

    Which point effect in crystal doesn't alter the density of the relevant solid?

  • 3)

    Define void.

  • 4)

    Diamond and solid rhombic sulphur are covalent solids but the latter has very low melting point than the former. Explain why?

  • 5)

    Define the term: space lattice.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    HO CH2 CH2 – OH on heating with periodic acid gives  ______.

  • 2)

    Which of the following compound can be used as antifreeze in automobile rediators?

  • 3)

    The reactions
     is an example of  ______.

  • 4)

    One mole of an organic compound (A) with the formula C3H8O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is  ______.

  • 5)

    Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Name the seven primitive crystal systems.

  • 2)

    In CaF2 crystal, Ca2+ ions are present in arrangement. Calculate the number of F- ions in the unit cell.

  • 3)

    Distinguish between cubic and hexagonal unit cells.

  • 4)

    What is F centre?

  • 5)

    A compound forms hexagonal dosed packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The correct structure of the product ‘A’ formed in the reaction ______.

  • 2)

    Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.

  • 3)

    In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.

  • 4)

    \({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.

  • 5)

    Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How does the value of rate constant vary with reactant constant.

  • 2)

    Answer the following:
    (i) Effect the adding catalyst on activation energy and Gibb's energy (ΔG).
    (ii) Why do we heat the solution of oxalic acid in redox tetration against KMnO4?

  • 3)

    A first order reaction has a specific reaction rate of 10-3 S-1. How much time will it take for 10gm of the reactant to reduce to 2.5 gm?

  • 4)

    In a reaction, 2A \(\longrightarrow \) products, the concentration of A decreases from 0.5 mol L-1 to 0.4 mol L-1 in 10 minutes. Calculate the rate during this interval?

  • 5)

    Explain how will you find activation energy of a reaction by graphical method.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.

  • 2)

    In which of the following reactions new carbon – carbon bond is not formed?

  • 3)

    An alkene “A” on reaction with O3 and Zn - H2O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.

  • 4)

    Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.

  • 5)

    Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 x 10-4mol L-1. What is the order of the reaction.

  • 2)

    For the reaction Cl2 (g) + 2NO (g) ⟶ 2NOCI(g)
    The rate law is expressed as rate = K[Cl2] [NO]2
    What is the overall order of this reaction?

  • 3)

    Write the units of zeroth, first, second and third order rate constants.

  • 4)

    If the rate of a reaction gets doubled as the temperature is increased from 27oC to 37oC. Find the activation energy of reaction?

  • 5)

    Mention the factors that affected the rate of a chemical reaction.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which one of the following will not undergo Hofmann bromamide reaction.

  • 2)

    Assertion: Acetamide on reaction with KOH and bromine gives acetic acid
    Reason: Bromine catalyses hydrolysis of acetamide.
    Codes:
    a) if both assertion and reason are true and reason is the correct explanation of assertion.
    b) if both assertion and reason are true but reason is not the correct explanation of assertion.
    c) assertion is true but reason is false
    d) both assertion and reason are false.

  • 3)

    CH3CH2 Br \(\overset { aqNaOH }{ \underset { \Delta }{ \longrightarrow } } A\overset { { KMnO }_{ 4 }{ /H }^{ + } }{ \underset { \Delta }{ \longrightarrow } } B\overset { { NH }_{ 3 } }{ \underset { \Delta }{ \longrightarrow } } C\overset { { Br }_{ 2 }/NaOH }{ \longrightarrow } D\)  D' is________.

  • 4)

    Which one of the following nitro compounds does not react with nitrous acid.

  • 5)

    Aniline + benzoylchloride \(\overset { NaOH }{ \longrightarrow } \)C6H5 - NH - COC6 H5 this reaction is known as ______.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Define neutralisation reaction.

  • 2)

    When temperature is increased, will ionic product of water increase or decrease? Give reason to justify your answer.

  • 3)

    The KW of a neutral solution is 10-12 at a particular temperature. What are its pH and pOH values?

  • 4)

    How is common ion effect related to the solubility of the electrolyte?

  • 5)

    What are the limitations of Ostwald's dilution law?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

     _______.

  • 2)

    IUPAC name for the amine

  • 3)

    P Product ‘P’ in the above reaction is _______.

  • 4)

    Identify X in the sequence give below

  • 5)

    Among the following, the reaction that proceeds through an electrophilic substitution is : _______.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Give a condition for a compound to be precipitated.

  • 2)

    Magnesium is not precipitated from a solution of its salt by a mixture of NH4OH and NH4Cl. Explain

  • 3)

    BF3 is termed as an acid though it does not contain H+ ions. Explain.

  • 4)

    Calculate the ionisation constant for the conjugate base of HF. Ionisation constant of HF at 298 K is 6.8 x 10-4

  • 5)

    Why is aqueous solution of FeCl3 acidic?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The correct corresponding order of names of four aldoses with configuration given below Respectively is ______.

  • 2)

    \(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.

  • 3)

    The central dogma of molecular genetics states that the genetic information flows from______.

  • 4)

    Among the following the achiral amino acid is ______.

  • 5)

    In aqueous solution of amino acids mostly exists in ______.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Give examples of primary cells.

  • 2)

    Name the anode, cathode and electrolyte used in lithium - ion Battery

  • 3)

    What is known as intercalation?

  • 4)

    Write a note on galvanising

  • 5)

    What is corrosion?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which of the following vitamins is water soluble?

  • 2)

    Which of the following statement is correct?

  • 3)

    If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ______.

  • 4)

    α -D (+) Glucose and β-D (+) glucose are ______.

  • 5)

    Which of the following amino acids are achiral?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Give an example of secondary cell.

  • 2)

    Write the oxidation, reduction and overall redox reaction taking place in the Lithium ion battery.

  • 3)

    What is a fuel cell?

  • 4)

    Explain how iron is protected from corrosion by coating with magnesium.

  • 5)

    What is passivation?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statement is not true.

  • 2)

    Saccharin, an artificial sweetener is manufactured from ____________.

  • 3)

    Drugs that bind to the receptor site and inhibit its natural function are called _______.

  • 4)

    Aspirin is a/an _______.

  • 5)

    Which is the monomer of neoprene in the following?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is ultrasonic dispersion?

  • 2)

    Why are colloids purified?

  • 3)

    Give the methods of purification of colloids.

  • 4)

    What is Ultrafilteration?

  • 5)

    What is Helmholtz double layer?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    An example of anti-fertility drug is ____________.

  • 2)

    The drug used to induce sleep is _______________.

  • 3)

    Which of the following is a co-polymer?

  • 4)

    The polymer used in making blankets (artificial wool) is _______.

  • 5)

    Regarding cross-linked or network polymers, which of the following statement is incorrect?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is peptisation? Give an example.

  • 2)

    Explain the formation of delta.

  • 3)

    Why is a colloidal sol stable?

  • 4)

    Which will adsorb more gas, a lump of charcoal or its powder and why?

  • 5)

    Name the types of emulsions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What happens when anisole is nitrated?

  • 2)

    Give a test to identify whether a given -OH group is alcoholic or phenolic in nature.

  • 3)

    What happens when crotonaldehyde is reduced in the presence of LiAlH4?

  • 4)

    State Saytzeff's rule.

  • 5)

    Preparation of ethers by intermolecular dehydration of alcohols in the presence of an add is not a suitable method for mixed ethers. Give reason.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How will you convert C2H5OH to C2H5OC2H5?

  • 2)

    Explain 'esterification' reaction with an example.

  • 3)

    What happens when ethylene reacts with alkaline KMnO4 solution?

  • 4)

    Explain why phenol does not undergo substitution of the -OH group like alcohol.

  • 5)

    Give chemical test to distinguish between methanol and phenol.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is DIBAL -H? What is it used for?

  • 2)

    Write a note on Etard reaction?

  • 3)

    Write the structural formula of 1,1 - dimethoxy ethane. How is it prepared from ethanal?

  • 4)

    Acetone is soluble in water but benzophenone is not. Give reason.

  • 5)

    Write the structures of A and B in the following reaction. Name the reaction involved.
    \({ CH }_{ 3 }COCl\overset { pd/Ba{ SO }_{ 4 } }{ \underset { { H }_{ 2 } }{ \longrightarrow } } A\overset { { NH }_{ 2 }OH }{ \longrightarrow } B\)

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Name one reagent used to distinguish acetaldehyde and acetone.

  • 2)

    Does formaldehyde undergo aldol condensation? Justify your answer.

  • 3)

    What is urotropine? Give its use.

  • 4)

    What is formalin? Write its use.

  • 5)

    Write a note on haloform reaction.

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Which of the following is not a mineral of aluminium?

  • 2)

    Among the following, one does not belong to calcination, Pick the odd one out.

  • 3)

    Name the process by which elements such as germanium, silicon and galium are refined.

  • 4)

    In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with________.

  • 5)

    Which one of the following element is present as a impurity in pig iron?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What happens when acetonitrile is hydrolysed?

  • 2)

    How will you distinguish between ethylamine and diethylamine?

  • 3)

    What happens when aniline is treated with bromine?

  • 4)

    Explain why aniline is less basic than methylamine?

  • 5)

    Explain why amines are more basic than amides.

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The percentage of carbon in high carbon steel is_________.

  • 2)

    Steel is an alloy of___________

  • 3)

    Sodium cyanide solution is used to extract _________from its ores

  • 4)

    Galena is_______.

  • 5)

    In Hall-Heroult process___________act as an anode.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Convertmethylisocyanide ⟶ dimethylamine

  • 2)

    What is 'spirit of nitre'? Give its use.

  • 3)

    Write the uses of nitro alkanes.

  • 4)

    Give any two uses of nitrobenzene.

  • 5)

    In the given set of reactions, 2 bromopropane \(\xrightarrow [ \triangle ]{ Alc.AgCN } \ 'X'\underrightarrow { { LiAlH }_{ 4 } } 'Y'\). Identify the product Y and give its IUPAC name.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.

  • 2)

    Chemical formula of phosgene is_______.

  • 3)

    SiO44- ion has ____ geometry.

  • 4)

    Which of the following oxide is amphoteric?

  • 5)

    Which of the following statements about H3BO3 is not correct?

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Define nucleotide.

  • 2)

    The two strands in DNA are not identical but are complementary explain.

  • 3)

    Write a note on rRNA.

  • 4)

    Name the important biological functions of nucleic acids.

  • 5)

    What do you mean by zwitter ion?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Elements of group 13 mainly form covalent compounds because ______

  • 2)

    All elements except carbon have the tendency to show maximum covalency of six ______

  • 3)

    Group 14 elements have general electronic configuration _______.

  • 4)

    The silicates which contain discrete tetrahedral units are _______.

  • 5)

    Borax is _______.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Catenation property of group 15 elements, follow the order _______.

  • 2)

    Which is dibasic?

  • 3)

    Allotrope of sulphur which shows paramagnetic behaviour _______.

  • 4)

    Pick the wrong one among the following

  • 5)

    When Copper is heated with cone HNO3 it produces

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Name the two constituent of starch.

  • 2)

    What is renaturation?

  • 3)

    What do you mean by transcription?

  • 4)

    Give an example of an amino acid containing sulphur. Write its zwitter ion form.

  • 5)

    The sucrose that we eat in daily life is converted into glucose and fructose. Name the enzyme which facilitates this chemical reaction.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The incorrect statement regarding structure of ozone is______.

  • 2)

    Strong reducing behaviour of H3PO2 is due to______.

  • 3)

    Which reaction is not feasible.

  • 4)

    The ionisation energy of Ga is higher than that of Al because of_________

  • 5)

    The high reactivity of fluorine is due to________.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The highest possible oxidation state shown by osmium in its compound is_______.

  • 2)

    The trend in ionisation enthalpy of a transition element is not regular because,_______.

  • 3)

    Which one of the following exhibits highest oxidation state?

  • 4)

    Which of the following is coloured due to charge transfer?

  • 5)

    What are the species X and Y in the following?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write a note on Orion?

  • 2)

    Give an example of bacteriocidal antobiotic.

  • 3)

    Name two narcotic which are used as analgesics.

  • 4)

    Saccharin is 550 times sweeter than sugar, yet used to prepare sweets for diabetic patient - Give reason.

  • 5)

    Why Iodoform and phenolic solutions are called antiseptic?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    ________ has the highest electrical conductivity at room temperature.

  • 2)

    If the standard electrode potential (Eo) of a inetal is ________ and __________ the metal is a powerful reducing agent.

  • 3)

    Equivalent weight of KMnO4 in acidic medium is _______.

  • 4)

    The common oxidation state of lanthanonids is ________.

  • 5)

    _________ is known as Bayer's reagent.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Primary and secondary valencies of Cu in [Cu(NH3)4]SO4 is _______.

  • 2)

    Which of the following octahedral complexes do not show geometrical isomerism?

  • 3)

    The spin only magnetic moment of [Mnfsr4]2- is 5.9 BM. Geometry of the complex ion is _______.

  • 4)

    According to CFT, five d-orbitals of an octahedral complex split to give _______.

  • 5)

    Which of the following is correct statement?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    _______ valencies are directional in nature.

  • 2)

    The number of trans positions in a octahedral complex is _________.

  • 3)

    The chemical formula for diammine silver (I) chloride is _______.

  • 4)

    Magnetic moment is given by the formula _______.

  • 5)

    The oxidation state of the central metal ion in the complex [Co(H2O)(CN)(en)2]2+ is________.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

  • 2)

    What is wrong about a.b.c.c. unit cell?

  • 3)

    Which one of the following does not belong to AB type?

  • 4)

    The smallest repeating unit in space lattice which when repeated over and again results in the crystal of the given substance is called_______.

  • 5)

    The number of close neighbours in a body centred cubic lattice of identifical spheres is _______.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    If electrical conductivity is found to be same in all directions through a solid the substance is ________ solid and the property is called _________.

  • 2)

    Coordination number of tetrahedral and octahedral voids respectively are________.

  • 3)

    Crystals of NaCI has yellow colour due the presence of_________.

  • 4)

    Structure of B2O3 is _____.

  • 5)

    The correct order of packing efficiency in different types of unit cells is________.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write a note on General anaesthetics?

  • 2)

    What are Antacids? Give three examples of antacid.

  • 3)

    What are food additives?

  • 4)

    What are sugar substituents? Give two examples.

  • 5)

    Define TFM.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The Unit of rate constant and rate of reaction are same for ______.

  • 2)

    Which of the following statement is not correct?

  • 3)

    For an exothermic chemical process occurring in 2 steps as
    (i) A +B ⟶ X (slow) ;
    (ii) X ⟶  AB (fast)
    The progress of the reaction can be best described by (x- intermediate).

  • 4)

    Nitric oxide (NO) reacts wtih oxygen to produce nitrogen dioxide
    2NO(g) + O2(g) ⟶ 2NO2(g)
    If the mechanism of reaction is ______.
    NO + O2 \(\overset { K }{ \rightleftharpoons } \) NO3 (fast)
    NO3 + NO \(\overset { { K }_{ 1 } }{ \rightleftharpoons } \) NO2 + NO2 (slow)

  • 5)

    A reaction having equal activation energies for forward and reverse reactions has ______.

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is coupling of reaction? How is it useful in metallurgy?

  • 2)

    How oxides of metals are reduced by hydrogen?

  • 3)

    What is auto-reduction?

  • 4)

    Mention the uses of copper.

  • 5)

    What is Misawite? Give its composition.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    CH3COOCH3 + H2\(\overset { { H }^{ + } }{ \longrightarrow } \) CH3COOH + CH3OH is an example of _______ order reaction.

  • 2)

    For a general reaction aA + bB ⟶Products, the rate of the reaction is equal to______.

  • 3)

    In a second order reaction, if one of the concentration is excess, the order of the reaction is ________ order reaction.

  • 4)

    If [A] is the concentration of A at any time t and [Ao] is the concentration at t = 0, then for the first order reaction, the rate equation can be written as ______.

  • 5)

    Activation energy of a reactant is reduced by ________.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are the differences between minerals and ores?

  • 2)

    What is the role of quick lime in the extraction of Iron from its oxide Fe2O3?

  • 3)

    Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

  • 4)

    Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

  • 5)

    Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Pick out the incorrect statement regarding Lewis acids and bases

  • 2)

    With regard to the strength of acids and bases, Find the incorrect statement among the following.

  • 3)

    HCl is a strong acid since _______.

  • 4)

    Ionic product of water increases when _______.

  • 5)

    An aqueous solution with pH value zero is _______.

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is cyanide leaching? Give an example

  • 2)

    What is meant by ammonia leaching?

  • 3)

    How is acid leaching done for the sulphide ores?

  • 4)

    Explain roasting with an example.

  • 5)

    What is vapour phase method?

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are the differences between minerals and ores?

  • 2)

    What are the various steps involved in the extraction of pure metals from their ores?

  • 3)

    Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

  • 4)

    Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

  • 5)

    Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    \({ X }_{ m }{ Y }_{ n(s) }\overset { { H }_{ 2 }O }{ \rightleftharpoons } { mX }_{ (aq) }^{ n+ }+{ nY }_{ (aq) }^{ m- }\)

  • 2)

     Which among the following is incorrect regarding acids?

  • 3)

    When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid _______.

  • 4)

    Which one of the following formula represents Ostwald's dilution law for a binary whose degree of dissociation is a and concentration C.

  • 5)

    Which one of the following relationship is correct?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How is aluminium chloride prepared by McAfee process?

  • 2)

    Describe the structure of graphite.

  • 3)

    Describe the structure of fullerenes.

  • 4)

    Describe the structure of graphene.

  • 5)

    How is CO2 manufactured?

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write a short note on anamolous properties of the first element of p-block.

  • 2)

    Describe briefly allotropism in p- block elements with specific reference to carbon.

  • 3)

    Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF3.

  • 4)

    Write a note on Fisher tropsch synthesis.

  • 5)

    Give the structure of CO and CO2.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid ______.

  • 2)

    NH4OH is a weak base because ______.

  • 3)

    An example for 1 : 1 electrolyte is ______.

  • 4)

    According to Faraday's first law m = ZIt, where Z is ______.

  • 5)

    1 mho is equal to ______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What are the uses of boric acid?

  • 2)

    How is boron trifluoride obtained from boron trioxide?

  • 3)

    How is aluminum chloride prepared from aluminum?

  • 4)

    Give 3 uses of aluminium chloride

  • 5)

    Describe the structure of diamond.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Describe briefly allotropism in p- block elements with specific reference to carbon.

  • 2)

    Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF3.

  • 3)

    Give the uses of Borax

  • 4)

    What is catenation ? describe briefly the catenation property of carbon.

  • 5)

    Write a note on Fisher tropsch synthesis.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The electrode where there is gain of electrons is called ______.

  • 2)

    The zinc - copper cell has emf of _______.

  • 3)

    For gases, the standard emf depends on _______.

  • 4)

    SHE is _______.

  • 5)

    The feasibility of a redox reaction can be predicted with the help of ________.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain the characteristic properties of hydrogen halides.

  • 2)

    Write the order of thermal stability of the hydrides of group 16 elements.

  • 3)

    Explain why the stability of oxoacids of chlorine increases in the order given below?
    HCIO < HCIO2 < HCIO3 < HCIO4

  • 4)

    CIF3 molecule has aT-shaped structure and not a trigonal planar one. Why?

  • 5)

    Predict the product
    (i) PCI5+ C2H5OH \(\longrightarrow \)?
    (ii) P4+ SO2Cl2 \(\longrightarrow \) ?
    (iii) POCl3 + H2O \(\longrightarrow \) ?
    (iv) HBr + PH3\(\longrightarrow \) ? :,
    (v) PCl3+ H2O\(\longrightarrow \) ?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give the oxidation state of halogen in the following.
    a) OF2
    b) O2F2
    c) Cl2O3
    d) I2O4

  • 2)

    Why fluorine is more reactive than other halogens?

  • 3)

    Give the uses of helium.

  • 4)

    What is the hybridisation of iodine in IF7? Give its structure.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The phenomenon of Tyndall's effect is not observed in _______.

  • 2)

    Colloidal medicines are more efffective because _______.

  • 3)

    Oil soluble dye is mixed with emulsion and emulsion remains colourless then, the emulsion is _______.

  • 4)

    For chemisorption, which is wrong?

  • 5)

    Colloids are purified by _______.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain the reaction of ammonia with chlorine and chlorides at different conditions.

  • 2)

    Explain the commercial method of preparation of nitric acid.

  • 3)

    Give a test for sulphate?

  • 4)

    An element A occupies group number 17 and period number 2 is the most electronegative element. Element A reacts with another element B) which occupies group number 17 and period number 4 to give a compound Compound C undergoes sp3d2 hybridisation and has octahedral structure. Identify the elements a and B and the compound C. Write the reactions.

  • 5)

    Discuss the anomalous nature of fluorine.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What is inert pair effect?

  • 2)

    Chalcogens belongs to p-block. Give reason.

  • 3)

    Explain why fluorine always exhibit an oxidation state of -1?

  • 4)

    What are interhalogen compounds? Give examples.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Decomposition of hydrogen peroxide is retarded in the presence of________.

  • 2)

    The emulsifying agent used in O/W type is _______.

  • 3)

    Emulsifying agent is used for________.

  • 4)

    The colloid used for stomach disorder is_______.

  • 5)

    Argyrol is_______.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write the properties of interstitial compound.

  • 2)

    What is chromyl chloride test? Give equations.

  • 3)

    Explain the preparation of potassium permanganate from pyrolusite.

  • 4)

    Give the ionic reaction of electrolytic of aqueous solution of KMnO4

  • 5)

    Explain the oxidising property of KMnO4 in natural medium. Give the equations.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are transition metals? Give four examples.

  • 2)

    Explain the oxidation states of 4d series elements.

  • 3)

    Describe the preparation of potassium dichromate.

  • 4)

    What is lanthanoid contraction and what are the effects of lanthanoid contraction?

  • 5)

    Complete the following.
    a. 3MnO42- + 4H+ ⟶?
    b. C6H5CH3 \(\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } } \)?
    c. MnO4- + Fe2+ ⟶?
    d. KMnO4 \(\overset { \triangle }{ \underset { Red\ hot }{ \longrightarrow } } \) ?
    e. Cr2O72- + 6I- + 14H+ ⟶?
    f. Na2Cr2O7 + 2KCl ⟶?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Which of the following has an offensive odour?

  • 2)

    Which of the following is not correct? Glycerol is used as ______.

  • 3)

    Which one of the following is optically active?

  • 4)

    The compound that does not undergo Cannizaro reaction is ______.

  • 5)

    Which one of the following is simple ether?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What are the uses of potassium dichromate?

  • 2)

    What happens to potassium permanganate on chemical oxidation?

  • 3)

    Explain the oxidising property of KMnO4 in alkaline medium.

  • 4)

    What are the causes of lanthanoids contraction?

  • 5)

    Which is the last element in the series of the actinoids? Write the electronic configuration of this element comment on the possible oxidation state of this element.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are inner transition elements?

  • 2)

    Justify the position of lanthanoids and actinoids in the periodic table.

  • 3)

    What are actinides? Give three examples.

  • 4)

    Why Gd3+ is colourles?

  • 5)

    Explain why compounds of Cu2+ are coloured but those of Zn2+ are colourless.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The number of possible isomers for molecular formula C4H10O is _________.

  • 2)

    The number of alcohol isomers for molecular formula C4H10O is ________.

  • 3)

    CH3-CH2-O-CH2CH3 and \({ CH }_{ 3 }-O-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 3 }\) are examples of _______ isomerism.

  • 4)

    _______ cannot be prepared by using Grignard reagent.

  • 5)

    On heating, peroxides are ________.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain optical isomerism.

  • 2)

    Explain Bonding is metal carbonyls.

  • 3)

    What is stability constant?

  • 4)

    Name some metal complexes, that are present in our biological system and their role in it.

  • 5)

    Mohr's salt answers the presence of Fe2+, NH4+and SO42- ions, whereas the potassium ferrithiocyanate will not answer Fe3+ and SCN ions give reason.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write the IUPAC names for the following complexes.

  • 2)

    Write the formula for the co-ordination compounds. 

  • 3)

    Arrange the following in order of increasing molar conductivity
    (i) Mg[Cr(NH3)(Cl)5]
    (ii) Cr(NH3)5Cl]3[CoF6]2
    (iii) [Cr(NH3)3Cl3]

  • 4)

    Draw all possible geometrical isomers of the complex [Co(en)2Cl2]+ and identify the optically active isomer.

  • 5)

    [Ti(H2O)6]3+ is coloured, while [Sc(H2O)6]3+ is colourless- explain.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Cannizaro reaction is not given by _______.

  • 2)

    The IUPAC name of the compound

  • 3)

    Identify 'X'.

  • 4)


    Choose a suitable reagent to carry out the above reaction.

  • 5)

    A compound 'X' when mixed with ethanol and a drop of concentrated H2SO4 gave a compound with fruity odour. Identify 'X'.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The rate constant k for the first order gas phase decomposition of ethyl iodide, C2H5I ⟶ C2H4 + HI is 1.60 x 10-5 s-1 at 600k and 6.36 x 10-3 s-1 at 700K. Calculate the energy of activation for this reaction.

  • 2)

    From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.
    (i) 3NO(g) ⟶ N2O(g) Rate = K[NO]2
    (ii) H2O2(aq) + 3I-(aq) +2H+ ⟶ 2H2O(l) +I3- Rate = K[H2O2][I-]
    (iii) CH3CHO(g) ⟶ CH4(g) + CO(g) Rate = K[CH3 CHO]3/2
    (iv) C2H5Cl(g) ⟶ C2H2(g) + HCl(g) Rate = K[C2H5Cl]2

  • 3)

    A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is
    (i) doubled (ii) reduced to half

  • 4)

    A reaction is first order in A and second order in B.
    (i) Write the differential rate equation.
    (ii) How is rate affected on increasing the concentration of B three times?
    (iii) How is the rate affected when the concentrations of both A and B are doubled?

  • 5)

    The rate constant for a first order reaction is 60 S-1. How much time will it take to reduce the initial concentration of the reactant to its \({ \frac { 1 }{ 16 } }^{ th }\) value?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Ni2+ is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction.

  • 2)

    [CuCl4]2- exists while [Cul4]2- does not exist why?

  • 3)

    Calculate the ratio of \(\frac { \left[ { Ag }^{ + } \right] }{ \left[ Ag\left( NH_{ 3 } \right) _{ 2 } \right] ^{ + } } \) in 0.2 M solution of NH3. If the stability constant for the complex \([Ag(NH_{ 3 })_{ 2 }]^{ + }\) is 1.7 x 107

  • 4)

    Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.

  • 5)

    Based on VB theory explain why [Cr(NH3)6]3+ is paramagnetic, while [Ni(CN)4]2- is diamagnetic.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    With respect to the reagents given below, pick out the odd one _________.

  • 2)

    Formic acid contains _______ groups

  • 3)

    acid chloride + alcohol \(\longrightarrow\)?.

  • 4)

    CH3CHO and C6H5CH2CHO can be distinguished by ______.

  • 5)

    \(Phenol\overset { Zn }{ \underset { dust }{ \longrightarrow } } 'X'\overset { { CH }_{ 3 }Cl }{ \underset { anhy\ AlC{ I }_{ 3 } }{ \longrightarrow } } Y\overset { alk }{ \underset { { KMnO }_{ 4 } }{ \longrightarrow Z } } \) the product Z is __________.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What do you mean by auto ionisation of water?

  • 2)

    Define buffer Index

  • 3)

    How will you calculate solubility product from molar solubility?

  • 4)

    What is Henderson equation?

  • 5)

    What do you mean by buffer action?

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain briefly seven types of unit cell.

  • 2)

    Distinguish between hexagonal close packing and cubic close packing.

  • 3)

    Distinguish tetrahedral and octahedral voids.

  • 4)

    What are point defects?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    C6H5NH\(\underrightarrow { { NANO }_{ 2 }/HCl } \)  X Identify X.

  • 2)

    Aniline differs from ethylamine by the reaction with

  • 3)

    Which among the following dissolves in NaOH?

  • 4)

    When nitro methane condenses with acetone it gives

  • 5)

    Which gives an yellow oil with nitrous acid?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Draw the structures of geometrical isomers of [Fe(NH3)2 (CN)4]-

  • 2)

    What are the limitations of VBT?

  • 3)

    What is \(\pi \) back bonding?

  • 4)

    What is the significance of stability constants?

  • 5)

    Draw and explain the structure of Cisplatin.

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain briefly seven types of unit cell.

  • 2)

    Distinguish between hexagonal close packing and cubic close packing.

  • 3)

    Distinguish tetrahedral and octahedral voids.

  • 4)

    What are point defects?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The compound that does not show tautomerism is ____________

  • 2)

    CCl3 NO2 is used as ________

  • 3)

    Use of chloropicrin is as ____________

  • 4)

    Oxidation of aniline with acidified K2Cr2O7 gives ___________

  • 5)

    The intermediate formed in the nitration of benzene is _________

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write a note on the assignment of atoms per unit cell in fcc.

  • 2)

    State Bragg's law.

  • 3)

    Write the properties of ionic crystals.

  • 4)

    Answer the following:
    (I) Name the intermolecular force present in ice.
    (II) What type of bond is present in network solid?

  • 5)

    Distinguish the following.Crystal lattice and unit cell.

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Which is a monosaccharide among the following?

  • 2)

    Sucrose is not

  • 3)

    Glucose is not oxidised to gluconic acid by

  • 4)

    The amino acid without chiral carbon is

  • 5)

    Which is not true of amino acid?

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Silver crystallines in fcc lattice. If edge length of the cell is 4.07 x 10-8 em and density is 10.5 g cm-3. Calculate the atomic mass of silver

  • 2)

    Why are solids incompressible?

  • 3)

    What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3rd of tetrahedral voids?

  • 4)

    Inspite of long range order in the arrangement of particles, why are the crystals usually not perfect?

  • 5)

    ZnO turns yellow on heating. Why?

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The sugar unit present in nucleic acid is___________

  • 2)

    Penta hydroxy hexanone is__________

  • 3)

    In acidic solution an amino acid, when placed in an electric field__________

  • 4)

    The precipitation of protein is called_________

  • 5)

    Hydrolysis of cellulose yields_______

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The activation energy of the reaction 2HI(g) ⟶ H2(g) +I2(g) is 209.5 KJ mol-1 at 581 K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy.

  • 2)

    The decomposition of NH3 on platinum surface is zero order reaction what are the rates of production of N2 and H2 if k = 2.5 x10-4 mol + L S-1.

  • 3)

    What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

  • 4)

    Calculate the half-life of a first order reaction from their rate constants given below.
    (i) 200 S-1
    (ii) 2 min-1
    (iii) 4 years-1

  • 5)

    Write the differences between rate and rate constant of a reaction.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Define average rate and instantaneous rate.

  • 2)

    Define rate law and rate constant.

  • 3)

    Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product.

  • 4)

    What is the order with respect to each of the reactant and overall order of the following reactions?
    a) 5Br-(aq)+BrO3-(aq)+6H+(aq) ➝3Br2(l)+3H2O(l)
    The experimental rate law is Rate = k [Br][BrO3][H+]2
    b) CH3CHO(g)\(\overset { \Delta }{ \longrightarrow } \) CH4(g)+CO(g) the experimental rate law is
    Rate =K[CH3CHO]\(\frac{3}{2}\)

  • 5)

    The rate of the reaction X + 2y→ product is 4 x 10-3 mol L-1S-1, if [X] = [Y] = 0.2M and rate constant at 400K is 2 x 10-2s-1, What is the overall order of the reaction.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Sulphur dioxide act as _________

  • 2)

    The monomer of PVC is _______

  • 3)

    Which of the following is not a non - narcotic analgesic?

  • 4)

    Zeiglar Natta catalyst is _________

  • 5)

    Addition polymerisation is also called as _______ polymerisation.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Why does the emf of Leclanche cell decrease?

  • 2)

    Explain the reactions taking place in the anode and cathode of a lead storage battery.

  • 3)

    Corrosion of aluminum takes place at a much slower rate than iron. Give reason

  • 4)

    State Ohms law.

  • 5)

    The standard reduction potential of Fe3+, Fe2+ / Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Zeiglar Natta catalyst is _________

  • 2)

    Addition polymerisation is also called as _______ polymerisation.

  • 3)

    The polymer obtained by the condensation of phenol with formaldehyde is ________

  • 4)

    The specific treatment of a disease using medicine is known as ________

  • 5)

    Proteins which act as biological catalysts are called ________

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The standard reduction potential of Fe3+, Fe2+ / Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?

  • 2)

    Write the overall redox reaction for the zinc-copper cell. Show the oxidation and reduction half reaction.

  • 3)

    Show that SHE can act both as a anode as well as cathode.

  • 4)

    Derive the relation between EMF and free energy.

  • 5)

    Draw a neat diagram of Leclanche cell and mark the parts.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write a note on auto catalysis?

  • 2)

    What are the important concepts of catalysis that adsorption theory explains?

  • 3)

    Give an example for a reaction catalysed by nano particles

  • 4)

    How are colloidal solution of ink and graphite prepared?

  • 5)

    What are the advantages of Brownian movement?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Define Gold number.

  • 2)

    Name various techniques by which a colloid can be deemulsified.

  • 3)

    Name two industrial process where heterogeneous catalysts are used.

  • 4)

    Define adsorption.

  • 5)

    For the coagulation of 100 ml of arsenious sulphide sol, 5 ml of 1 M NaCI is required. What is the flocculation value of NaCl?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Why is that tertiary alcohols show greater reactivity towards hydrogen halides than secondary and primary alcohols?

  • 2)

    How is glycerol obtained commercially? State its uses.

  • 3)

    Give a brief account of the following reaction: Etherification.

  • 4)

    Identify the isomerism in each of the following pairs.
    CH3OCH2OCH3 and CH3OCH2CH2OH
    CH3CH(OH)CH2OH and CH2OHCH2CH2OH
    \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-OH\) and CH3-CH2-CH2-CH2OH

  • 5)

    Give the IUPAC names of each of the following and classify them as 1°, 2° and 3°
    (a) CH3(CH2)3CHOHCH(CH3)2
    (b) (CH3)3C-CH2OH
    (c) \(({ CH }_{ 3 })_{ 2 }\underset { \overset { | }{ { C }_{ 6 }{ H }_{ 5 } } }{ C } -OH\)
    (d) \(BrCH_{ 2 }-\underset { \overset { | }{ OH } }{ { CH }_{ 2 } } -CH-C({ CH }_{ 3 })_{ 3 }\)
    (e) CH2=CH-CHOHCH
    (f) PhCH2OH
    (g) HOCH2CH2CH2CH2C6H5
    (h) (C2H5)3COH

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How will you prepare phenol (i) From chloro benzene (ii) From benzene sulphonic acid?

  • 2)

    How is nitroglycerine prepared from glycerol?

  • 3)

    How do ethers react with HI? Give the significances of the reaction.

  • 4)

    Account for the following:
    (I) Phenol does not get protonated readily.
    (ii) Phenol, benzene diazonium chloride, NaOH solution gives red dye.

  • 5)

    Halo alkane are easily prepared from alcohols while alkyl halides cannot be prepared from phenol. Justify.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration.

  • 2)

    What is an elementary reaction? Give the differences between order and molecularity of a reaction.

  • 3)

    Explain the rate determining step with an example.

  • 4)

    Describe the graphical representation of first order reaction.

  • 5)

    Write the rate law for the following reactions.
    (a) A reaction that is 3/2 order in x and zero order in y.
    (b) A reaction that is second order in NO and first order in Br2.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain Stephen's reaction.

  • 2)

    Formaldehyde and benzaldehyde give Cannizaro reaction but acetaldehyde does not - account for this.

  • 3)

    How is carboxylic acid prepared from alcohols?

  • 4)

    Write a note on
    (i) Perkin's reaction, and
    (ii) Knoevenagal reaction.

  • 5)

    What happens when the following compounds are treated with dilute NaOH solution in cold?
    (i) propanal
    (ii) (CH3)3C-CHO

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are Lewis acids and bases? Give two example for each.

  • 2)

    Discuss the Lowry – Bronsted concept of acids and bases.

  • 3)

    Calculate the concentration of OH- in a fruit juice which contains \(2\times10^{-3}\) M, H3O+ ion. Identify the nature of the solution.

  • 4)

    Calculate the pH of 0.001M HCl solution

  • 5)

    Calculate pH of 10-7 M HCl

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How will you convert benzaldehyde to
    (I) C6H5COOH
    (ii) C6HsCH2OH
    (iii) C6HSCH3

  • 2)

    What is Malachite green dye? Explain its preparation?

  • 3)

    Formic acid reduces Tollen's reagent but acetic acid does not - Give reasons.

  • 4)

    Write the structure of 'A' and 'B' in the following reaction
    \({ C }_{ 6 }{ H }_{ 5 }MgBr+{ CO }_{ 2 }\overset { (i)CO_{ 2 } }{ \underset { (ii){ H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow } } A\overset { { Br }_{ 2 } }{ \underset { FeBr_{ 3 } }{ \longrightarrow } } B\)

  • 5)

    Give the IUPAC names for the following:
    (i) Crotonaldehyde
    (ii) Methyl n-propyl ketone
    (iii) Phenyl acetaldehyde.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Indentify the conjugate acid base pair for the following reaction in aqueous solution
    i) HS- (aq) + HF \(\rightleftharpoons \) F-(aq) + H2S(aq)
    ii) HPO2-+ SO32- \(\rightleftharpoons \) PO43- + HSO3-
    iii) NH4+ CO32-  \(\rightleftharpoons \) NH+ HCO3-

  • 2)

    Account for the acidic nature of HClO4 in terms of Bronsted – Lowry theory, identify its conjugate base.

  • 3)

    When aqueous ammonia is added to CuSO4 solution, the solution turns deep blue due to the formation of tetra ammine copper (II) complex,\({ [Cu({ H }_{ 2 }O)_4] }_{ (aq) }^{ 2+ }+ 4{ NH }_{ 3 }(aq)\rightleftharpoons { [Cu{ ({ NH }_{ 3 }) }_{ 4 }] }_{ (aq) }^{ 2+ }\) among H2O and NH3 Which is stronger Lewis base.

  • 4)

    The concentration of hydroxide ion in a water sample is found to be 2.5 × 10-6M. Identify the nature of the solution.

  • 5)

    A lab assistant prepared a solution by adding a calculated quantity of HCl gas 250C to get a solution with [H3O+] = 4\(\times\)10-5M. Is the solution neutral (or) acidic (or) basic.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain Levine and hauser acetylation.

  • 2)

    How can the following conversion be effected?
    i) Nitrobenzene to anisole
    ii) Chloro benzene to phenyl hydrazine
    iii)  Aniline to benzoic acid
    iv) Benzene diazonium chloride to ehtyl benzene.

  • 3)

    How are the following compounds obtained from benzene diazonium chloride?
    (i) phenol
    (ii) ester
    (iii) p-hydroxy azo benzene

  • 4)

    Write a note on structure of amine.

  • 5)

    An organic compound 'A' on reduction gives compound 'B' which on reaction with trichloromethane and caustic potash forms 'C'. Compound 'C' on catalytic reduction given N-methyl benzenamine. Identify A, B and C and write the reactions involved.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Define anode and cathode

  • 2)

    Why does conductivity of a solution decrease on dilution of the solution.

  • 3)

    State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution.

  • 4)

    Describe the electrolysis of molten NaCl using inert electrodes

  • 5)

    The resistance of a conductivity cell is measured as 190 Ω using 0.1M KCl solution (specific conductance of 0.1M KCl is 1.3 Sm-1). When the same cell is filled with 0.003 M sodium chloride solution, the measured resistance is 6.3KΩ. Both these measurements are made at a particular temperature. Calculate the specific and molar conductance of NaCl solution.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    An Organic compound (A) with molecular formula C6H7N gives (B) with HNO2 / HCI at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with netural FeCI3. Identify the compounds (A), (B) and (C) and write the equations.

  • 2)

    Outline the preparation of (a) para nitroaniline from aniline, (b) tri bromo benzene from tribromo aniline

  • 3)

    Aniline reacts with Br2/H2O to give a tribromo derivative. How would you convert aniline to get a monobromo derivate?

  • 4)

    Convert aniline to p-nitro aniline

  • 5)

    Starting from the following reagents, how will your prepare ethanenitrile.
    i) CH3Br
    ii) CH3CONH2
    iii) CH3CH=NOH

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Describe the construction of Daniel cell. Write the cell reaction.

  • 2)

    Why is anode in galvanic cell considered to be negative and cathode positive electrode?

  • 3)

    Which of 0.1M HCl and 0.1 M KCl do you expect to have greater \(\stackrel{0}{\Lambda}_{\mathrm{m}}\)and why?

  • 4)

    A conductivity cell has two platinum electrodes separated by a distance 1.5 cm and the cross sectional area of each electrode is 4.5 sq cm. Using this cell, the resistance of 0.5 N electrolytic solution was measured as 15 Ω. Find the specific conductance of the solution.

  • 5)

    Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is 12.04 x 10-2 Sm-1.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    In a coagulation experiment 10 mL of a colloid (X) is mixed with distilled water and 0.1M solution of an electrolyte AB so that the volume is 20 mL. It was found that all solutions containing more than 6.6 mL of AB coagulate with in 5 minutes. What is the flocculation values of AB for sol (X)?

  • 2)

    The mechanism of Fridel crafts reaction is given below
    \({ C }_{ 6 }{ H }_{ 5 }+{ { CH }_{ 3 }Cl\overset { anhydrous\\ \quad { Alcl }_{ 3 } }{ \longrightarrow } }{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }+HCl\)

  • 3)

    Thermal decomposition of KClO in presence of MnO2 proceeds as follows.
    Steps in the reaction 2KClO → 2KCl + 3Ocan be given as

  • 4)

    Formation of water due to the reaction of H2 and O2 in the presence of Cu proceeds as follows. Steps in the reaction H2 + 1/2O2 → H2O can be given as

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give two important characteristics of physisorption.

  • 2)

    Differentiate physisorption and chemisorption.

  • 3)

    In case of chemisorption, why adsorption first increases and then decreases with temperature?

  • 4)

    Which will be adsorbed more readily on the surface of charcoal and why? NH3 or CO2?

  • 5)

    Heat of adsorption is greater for chemisorptions than physisorption. Why?

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Draw the structure of α -D fructose furanose and β - D fructose furanose.

  • 2)

    Why sucrose is called invert sugar?

  • 3)

    ExpIain the classification of proteins based on their structure.

  • 4)

    What are carbohydrates? Give two examples.

  • 5)

    Write a note on tertiary structure of proteins.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
    (i) Acid catalysed hydration
    (ii) Hydroboration
    (iii) Hydroxylation using Baeyer's reagent

  • 2)

    Arrange the following in the increasing order of their boiling point and give a reason for your ordering
    (i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
    (ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol

  • 3)

    Can we use nucelophiles such as NH3,CH3- for the Nucleophilic substitution of alcohols

  • 4)

    Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Amino acids are amphoteric in nature. Explain.

  • 2)

    How do enzymes help a substrate to be attacked by the reagent effectively?

  • 3)

    Give the structure of sucrose.

  • 4)

    Write the monomers of the following sugars and explain how they are linked.
    (i) Sucrose
    (ii) Maltose
    (iii) Lactose

  • 5)

    Name the two components starch is made up of. How do they differ from each other.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.

  • 2)

    Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

  • 3)

    Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.

  • 4)

    What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    State the laws of reflection.

  • 2)

    What is angle of deviation due to reflection?

  • 3)

    Give the characteristics of image formed by a plane mirror.

  • 4)

    Derive the relation between f and R for a spherical mirror.

  • 5)

    What are the Cartesian sign conventions for a spherical mirror?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    How is Low density polyethene prepared?

  • 2)

    The monomer is capro lactam   Identify the polymer when the monomer is heated at 533K.

  • 3)

    Give the condensation reaction between urea and formaldehyde. Identify the polymer.

  • 4)

    How is Buna - N prepared? Give its use.

  • 5)

    Give examples for
    (i) addition polymer,
    (ii) Synthetic rubbers,
    (iii) Condensation polymers,
    (iv) formaldehyde resins.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How is propanoic acid is prepared starting from
    (a) an alcohol
    (b) an alkylhalide
    (c) an alkene

  • 2)

    A Compound (A) with molecular formula C2H3N on acid hydrolysis gives (B) which reacts with thionylchloride to give compound(C). Benzene reacts with compound (C) in presence of anhydrous AlCl3 to give compound(D). Compound (D) on reduction with Zn/Hg and Conc.HCl gives (E).  Identify (A), (B), (C) (D) and (E). Write the equations.

  • 3)

    Identify X and Y.
    \({ CH }_{ 3 }CO{ CH }_{ 2 }{ CH }_{ 2 }COO{ C }_{ 2 }{ H }_{ 5 }\overset { { CH }_{ 3 }MgBr }{ \longrightarrow } X\overset { { H }_{ 3 }{ O }^{ + } }{ \longrightarrow } Y\)

  • 4)

    Identify A, B and C
     

  • 5)

    A hydrocarbon A (molecular formula C8H10) on ozonolysis gives B (C4H6O2) only. Compound C (C3H5Br) on treatment with magnesium in dry ether gives (D) which on treatment with CO2 followed by acidification gives(C). Identify A, B and C.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Give the structure of melamine formaldehyde resin.

  • 2)

    How is Nylon - 6,6 prepared? Give it use.

  • 3)

    Write the preparation of neoprene and give its use.

  • 4)

    Identify the polymer and write the reaction involved.
    (i) Buta-1,3-diene and styrene in the presence of sodium.
    (ii) 3 - hydroxy butanoic acid and 3-hydroxy pentanoic acid.

  • 5)

    Identify the monomers of the following polymers.

    (ii) (NH(CH2)6 NHCO (CH2)4 CO)n
    (iii) \({ CH }_{ 2 }-\underset { \overset { | }{ Cl } }{ C } =CH-{ CH }_{ 2 })_{ n }\)

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write a note on drug target interaction.

  • 2)

    Explain Receptor as drug targets.

  • 3)

    Explain the classification of polymers based on their structure and mode of synthesis.

  • 4)

    Styrene polymerises to polystyrene when heated in the presence of peroxide initiator.
    (i) What is the mechanism involved?
    (ii) Give the initiation step for the above process.
    (iii) How does the chain propogate in the above mechanism?
    (iv) How is the above chain reaction terminated?

  • 5)

    Explain the prepareation of Bakelite and Give its use.

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Give the uses of carbohydrates.

  • 2)

    Elucidate the structure of fructose.

  • 3)

    List the importance of proteins in biological processes.

  • 4)

    Outline the classification of carbohydrates giving example for each.

  • 5)

    Show the formation of a peptide bond with an equation.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write down the possible isomers of the C4H9NO2 give their IUPAC names.

  • 2)

    There are two isomers with the formula  CH3NO2. How will you distinguish between them?

  • 3)

    What happens when
    i. 2 – Nitropropane boiled with HCl
    ii. Nitrobenezene undergo electrolytic reduction in strongly acidic medium.
    iii. Oxidation of tert – butylamine with KMnO4
    iv. Oxidation of acetoneoxime with trifluoroperoxy acetic acid

  • 4)

    How will you convert nitrobenzene into
    i. 1,3,5 - trinitrobenzene
    ii. o and p- nitrophenol
    iii. m – nitro aniline
    iv. azoxybenzene
    v. hydrozobenzene
    vi. N – phenylhydroxylamine
    vii. aniline

  • 5)

    Identify compounds A, B and C in the following sequence of reactions.
    i) \({ C }_{ 6 }{ H }_{ 5 }NO_{ 2 }\overset { Fe/HCL }{ \longrightarrow } A\overset { HN{ O }_{ 2 } }{ \underset { 273K }{ \longrightarrow } } B\overset { { C }_{ 6 }{ H }_{ 5 }OH }{ \longrightarrow } C\)
    ii) \({ C }_{ 6 }{ H }_{ 5 }N_{ 2 }cl\overset { CuCN }{ \longrightarrow } A\overset { H_{ 2 }O/H^{ + } }{ \longrightarrow } B\overset { NH_3 }{ \longrightarrow } C\)
    iii) \({ C }{ H }_{ 3 }{ C }{ H }_{ 2 }I\overset { NaCN}{ \longrightarrow } A\overset {OH^-}{ \underset {Partial hydrolysis}{ \longrightarrow } } B\overset {NaOH+Br_2 }{ \longrightarrow } C\)
    iv) \({ C }{ H }_{ 3 }NH_{ 2 }\overset { CH_3 Br }{ \longrightarrow } A\overset { CH_{ 3 }COCl}{ \longrightarrow } B\overset { B_2H_6 }{ \longrightarrow } C\)
    v) \({ C }_{ 6 }{ H }_{ 5 }NH_{ 2 }\overset { (CH_{ 3 }CO)_{ 2 }O }{ \underset { Pyridine }{ \longrightarrow } } A\overset { HNO_{ 3 } }{ \underset { H_{ 2 }SO_{ 4 },288K }{ \longrightarrow } } B\overset { { H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow C } \)
    vi) 

    vii) \({ C }{ H }_{ 3 }CN_{ 2 }NC\overset { HgO }{ \longrightarrow } A\overset { H_{ 2 }O }{ \longrightarrow } B\overset { i) NaN{ O }_{ 2 }/HCL }{ \underset { ii){ H }_{ 2 }O }{ \longrightarrow } } \)

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Elucidate the structure of glucose.

  • 2)

    Define the following terms as related to proteins
    (i) Primary structure
    (ii) Secondary structure
    (iii) β strands

  • 3)

    List the importance of proteins in biological processes.

  • 4)

    Explain the classification of hormones.

  • 5)

    Distinguish glucose from fructose.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What happens when ethylamine is treated with
    (i) CHCl3/NaOH
    (ii) CS2
    (iii) C6H5CHO.

  • 2)

    Account for the following:
    (i) Nitroethane is soluble NaOH
    (ii) Nitroethane reacts with nitrous acid
    (iii) 2-methyl-2-nitro propane has neither of the properties.

  • 3)

    Write the differences between nitro methane and nitro benzene.

  • 4)

    Write a note on
    (i) Carbylamine reaction
    (ii) Mustard oil reaction
    (iii) Acetylation of benzylamine
    (iv) Formation of Schiff's base
    (v) Diazotisation reaction

  • 5)

    CuSO4 on mixing with NH3 (1:4 ratio) does not give test for Cu2+ ions but gives test for SO42- ions. Why?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Account for the following:
    i) (CH3)2 NH is stronger base than NH3
    ii) CH3CH2NH2 is more basic than CH3CONH2
    iii) Aniline is less basic than Ethyl amine
    iv) On sulphonation of aniline, p-amino benzene sulphonic acid is formed.

  • 2)

    Account for
    i) Reduction of CH3CH gives CH3CH2NHwhile CH3NC gives (CH3)2NH.
    ii) (CH3)2NH requires two molar proportion of CH3I to give the same crystalline product formed by (CH3)2N with one mole of CH3l.
    iii) Nitration of aniline with conc.HNO3 may end up with same meta nitro product.
    iv) p-toluidine is a stronger base than p-nitroaniline.

  • 3)

    How can the following coversion be effected?
    i) Nitrobenzene ⇾ Nitrosobenzene
    ii) Nitrobenzene ⇾ Azoxybenzene
    iii) Nitrobenzene ⇾ Hydrazobenzene

  • 4)

    How do primary, secondary and tertiary amines react with nitrous acid?

  • 5)

    Outline the mechanism of
    (a) Nitration of aniline,
    (b) Acetylation of aniline.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    An organic compound (A) C2H3OCI on treatment with Pd and BaSO4 gives (B) C2H4O which answers iodoform test. (B) when treated with cone.H2SO4 undergoes polymerisation to give (C) a cyclic compound. Identify (A), (B) and (C) and explain the reactions.

  • 2)

    An organic compound (A) with molecular formula C3H6O undergoes iodoform reaction. Two molecules of compound (A) react with dry HCI to give compound (B) (C6H10O). Compound (B) reacts with one more molecule of compound (A) to give compound (C) (C9H14O). Identify (A), (B) and (C). Explain the reactions.

  • 3)

    An organic compound A (C2H3N) on reduction with SnCI2/HCI gives B (C2H4O) which reduces Tollen's reagent. Compound B on reduction with N2H4/C2H5ONa gives C (C2H6). Identify the compounds A, B and C. Explain the reactions involved.

  • 4)

    An organic compound (A) of molecular formula C7H6O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C7H6O2 which gives brisk effervescence with NaHCO3 solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

  • 5)

    Ail organic compound. (A) C7H6O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What type of linkages hold together monomers of DNA?

  • 2)

    Give the differences between primary and secondary structure of proteins.

  • 3)

    Name the Vitamins whose deficiency cause i) rickets ii) scurvy

  • 4)

    Write the Zwitter ion structure of alanine

  • 5)

    Give any three difference between DNA and RNA.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Compound (A) with molecular formula C2H4O reduces Tollen's reagent. (A) On treatment with HCN gives compound (B). Compound (B) on hydrolysis with an acid gives compound (C) with molecular formula C3H6O3 which is an optically active compound. Compound (A) on reduction with N2H/C2HsONa gives a hydrocarbon (D) of molecular formula C2H6. Identify (A), (B), (C) and (D) and explain the reactions.

  • 2)

    An organic compound (A) of molecular formula C7H6O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C7H6O2 which gives brisk effervescence with NaHCO3 solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

  • 3)

    Ail organic compound. (A) C7H6O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

  • 4)

    An organic compound Aofmolecular formula C3H6O answers iodoform test. Another organic compound B of molecular formula C7H6O is known as oil of bitter almonds. A reacts with B to form an unsaturated compound C of molecular formula C10H10O. Compound B reacts with malonic acid in the presence of pyridine to form an unsaturated acid D of molecular formula C9H5O2 Identify A, B, C and D. Explain the reactions.

  • 5)

    Compound (A) with Molecular formula C7H6O does not reduce Fehling's solution. Compound (A) reacts with acetone in the presence of NaOH to give a compound (B) which is an α, β-unsaturated compound. Further (A) reacts with dimethyl aniline in the presence of cone, H2SO4 to give compound (C) which is a dye. Identify (A) (B) and (C). Explain the reactions.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What type of linkages hold together monomers of DNA?

  • 2)

    Give the differences between primary and secondary structure of proteins.

  • 3)

    Write the Zwitter ion structure of alanine

  • 4)

    Give any three difference between DNA and RNA.

  • 5)

    Write a short note on peptide bond.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write all possible isomers with molecular formula C4H10O and name them.

  • 2)

    Give short notes on the following: (a) Kolbe's reaction, (b) Riemer - Tiemann reaction

  • 3)

    How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and phenol, (iii) ethyl alcohol and benzyl alcohol?

  • 4)

    What are ethers? Write note on simple and mixed ethers with examples.

  • 5)

    Compound (A) with molecular formula C6H6O gives violet colour with neutral ferric chloride. (A) reacting with CCI4 and NaOH gives two isomers (B) and (C). (A) on oxidation with CrO2Cl2 gives (D) of molecular formula C6H4O2. Identity A, B, C and D. Explain the reactions.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which chemical is responsible for the antiseptic properties of dettol.

  • 2)

    What are antibiotics?

  • 3)

    Name one substance which can act as both analgesic and antipyretic.

  • 4)

    Write a note on synthetic detergents

  • 5)

    How do antiseptics differ from disinfectants?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    An organic compound (A) C2H6O liberates hydrogen on treatment with metallic sodium. (A) on mild oxidation gives (B) C2H4O which answers iodoform test. (B) when treated with cone. H2SO4 undergoes polymerisation to give (C) a cyclic compound. Identify (A) (B) and (C) and explain the reactions.

  • 2)

    An organic compound A of molecular formula C3H6O on reduction with LiAlH4 gives B. Compound B gives blue colour in Victor Meyer's test and also forms a chloride C with SOCl2. The chloride on treatment with alcoholic KOH gives D. Identify A, B, C and D and explain the reactions.

  • 3)

    An organic compound (A) of molecular formula C3H8O2 is obtained as by-product in the manufacture of soap. Compound (A) on heating with P2O5 gives an unsaturated compound (B) of molecular formula C3H4O. Compound (A) with well cooled mixture of Conc.H2SO4 and fuming HNO3 form compound (C) which is an explosive. Identify A, B and C and explain the rection.

  • 4)

    An organic compound (A) C6H6O gives violet colour with neutral FeCl3 solution. With NH3 in the presence of anhydrous ZnCI2, (A) gives (B) (C6H7N). (A) with dimethyl sulphate gives (C) (C7H8O). What are (A), (B) and (C)? Explain the reactions.

  • 5)

    An organic compound 'A' is a sodium salt of phenolic acid with molecular formula C7H5O3Na. 'A' on heating with soda lime gives compound 'B' of molecular formula C6H6O. 'B' gives violet colour with neutral ferric chloride. 'B' on treatment with C6H5COCI in the presence of NaOH gives an ester 'C'. Identify 'A', 'B' and 'C'. Explain the reactions.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Which chemical is responsible for the antiseptic properties of dettol.

  • 2)

    What are antibiotics?

  • 3)

    Name one substance which can act as both analgesic and antipyretic.

  • 4)

    How do antiseptics differ from disinfectants?

  • 5)

    What are food preservatives?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write the characteristics of adsorption.

  • 2)

    Write a note on Freundlich adsorption isotherm.

  • 3)

    Give the special characteristics of enzyme catalysed reactions.

  • 4)

    Explain the following
    (i) Reactant selectivity
    (ii) Transition state selectivity
    (iii) Product selectivity 

  • 5)

    Explain electrodialysis

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Write the characteristics of catalysts.

  • 2)

    Write a note on phase transfer catalysis.

  • 3)

    Explain the various chemical methods by which colloids can be prepared.

  • 4)

    Explain the electrical property of colloids with a neat diagram. (or) Write a note on Helmholta electrical double layer.

  • 5)

    Write any five applications of colloids in day - to day life.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    The standard reduction potential for the reaction Sn4+ + 2e- ⟶ Sn2+ is + 0.15v. Calcuate the free energy change of the reaction.

  • 2)

    The emf of the cell Cd/CdCl2, 25H2O / AgCI(s) Ag Eo is 0.675 V. Calculate of the cell reaction.

  • 3)

    The emf of the half cell Cu2+(aq)/ Cu(s). containing 0.01 M Cu2+solution is + 0.301V. Calculate the standard emf of the half cell

  • 4)

    Calculate the standard emf of the cell having the standard free energy change of the cell reaction is -64.84 kJ for 2 electrons transfer.

  • 5)

    The equilibrium constant of cell reaction: Ag(s) + Fe3+ ⇌ Fe2+ + Ag+ is 0.335 at 25°C. Calculate the standard emf of the cell AgI Ag+; Fe3+, Fe2+/Pt. Calculate Eo of the half cell Fe3+, Fe2+/Pt is 0.7791 V. Calculate Eo of Fe3+, Fe2+/ Pt half cell.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Calculate the emf of the cell Zn/ZnO2, OH-, HgO/Hg given that Eo values of OH-, ZnO and OH-, HgO/Hg half cells are -1.216 V and 0.098 V respectively.

  • 2)

    Calculate the emf of the cell having the cell reaction 2Ag+ + Zn ⇌ 2Ag + Zn2+ and Eocell = 1.56 V at 25°C when concentration of Zn2+ = 0.1 M and Ag+ = 10 M in the solution.
    \([{ E }_{ cell }={ E }_{ cell }^{ o }-\frac { RT }{ nF } In\frac { [{ Zn }^{ 2+ }] }{ [{ Ag] }^{ 2 } } ]\)

  • 3)

    How will you determine the conductivity of an electrolytic solution using a wheatstone, bridge?

  • 4)

    Explain SHE as a reference electrode.

  • 5)

    Write the electrochemical mechanism of corrosion.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    A buffer solution containing 0.1 mole of ammonium hydroxide and 0.15 mole of ammonium chloride per litre of the solution. Calculate the pH of the buffer solution. Kb for ammonium hydroxide is 1.8 x 10-5.

  • 2)

    Calculate the pH of 0.1 M NH4OH if Kb = 1.75 x 10-5

  • 3)

    Explain buffer action in an acidic buffer.

  • 4)

    On hydrolysis of salts of strong acid and strong base, the solution obtained is neutral. Justify your answer with a suitable example

  • 5)

    Derive the hydrolysis constant for the hydrolysis of salt of strong base and weak acid. Deduce its pH.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Calculate the pH of 0.02 m Ba(OH)2 aqueous solution assuming Ba(OH)2 as a strong electrolyte.

  • 2)

    Calculate the pH of 0.001 M HCI solution.

  • 3)

    If a solution has a pH of 7.41, determine its H+ concentration.

  • 4)

    The degree of dissociation of acetic acid in 0.1 Msolution is 0.04. Calculate Ka for acetic acid. Where a is the degree of dissociation, C is the concentration of the acid in moles/ lit.

  • 5)

    A 0.02 M solution of a weak mono basic acid is 5% ionised. Calculate the ionisation constant of the acid.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    A first order reaction laws on rate constant 1.15 x 10-3 S-1. How long will 5 g of this reactant take to reduce to 3g?

  • 2)

    Reaction is first order in A and second in B.
    (i) Write the different rate equation.
    (ii) How is the rate affected on increasing the concentration of B three times?
    (iii) How is the rate affected when the concentrations of both A and B are doubled?

  • 3)

    Rate constant of a first order reaction is 0.45 sec-1, calculate its half life.

  • 4)

    If 30% of a first order reaction is completed in 12 mins, what percentage will be completed in 65.33 mins?

  • 5)

    The half life period of first order reactions is 10 mins. What percentage of the reactant will remain after one hour?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    For the reaction 2A + B ⟶ A2B. The rate = k [A] [B]2 with k = 2.0 x 10-6 mol? L2 S-1. Calculate the initial rate of the reaction, when [A] = 0.1 mol L-1, [B] = 0.2 mol L-1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L-1

  • 2)

    In a pseudo first order hydrolysis of ester in water, the following results were obtained.

    1 0 30 60 90
    [Ester]mol L-1 0.55 0.31 0.17 0.085

    (i) Calculate the average rate of reaction between the time interval 30 to 60 seconds.
    (i) Calculate the pseudo first order rate constant for the hydrolysis of ester.

  • 3)

    Write an account of the Arrhenius equation for rates of chemical reactions. 

  • 4)

    For the reaction R - P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and second.

  • 5)

    A first order reaction laws on rate constant 1.15 x 10-3 S-1. How long will 5 g of this reactant take to reduce to 3g?

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body - centre. What is the formula of the compound? What is the coordination numbers of P and Q?

  • 2)

    What are molecular solids? Explain the types of molecular solids.

  • 3)

    How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.

  • 4)

    How are crystals classified?

  • 5)

    Write note on impurity defect?

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.

  • 2)

    What are the general characteristics of solids?

  • 3)

    An element with molar mass 2.7 x 10-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 103 kg m-3, What is the nature of the cubic unit cell?

  • 4)

    Explain the following: Similarities and differences between metallic and ionic crystals.

  • 5)

    What are stoichiometric defects in ionic solids? Explain

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    For the complex [NiCI4]2- write (i) the IUPAC name (ii) The hybridisation type (iii) The shape of the complex

  • 2)

    How are Co-ordination compounds classified?

  • 3)

    What are the salient feature of crystal field theory?

  • 4)

    How are metal carbonyls classified based on the structure?

  • 5)

    Give the structure for the following compounds.
    (i) pentaamminechlorocobalt (III) ion
    (ii) Triamminetrinitrito- k N cobalt (III)
    (ill) tetraammineaquabromidooobalt(III)nitrate
    (iv) Dichloridobisethane-(1,2-diamine) cobalt (lIl) chloride
    (v) Tetraamminecopper (lI) sulphate

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
    (i) K[Cr(H2O)2 (C2O4)2]
    (ii) [Co(en)3]CI3
    (iii) [Co(NH3)5(NO2)](NO3)2
    (iv) [Pt (NH3)(H2O)CI2]

  • 2)

    What is meant by stability of a co-ordination compound in solution? State the factors which govern stability of complexes.

  • 3)

    What are the main assumptions of Valence Bond Theory? Explain.

  • 4)

    How are metal carbonyls classified depending on the number of metal atoms?

  • 5)

    Give the IUPAC name for the following compounds.
    (i) [Ag(NH3)2]CI
    (ii) K3[Fe(CN)5NO]
    (ill) [Cr(PPh3)(CO)3]
    (iv) [Ag(NH3)2]+
    (v) [FeF6]4-

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Justify the following statement.
    "Elements of the first transition series possess many properties different from those of heavier transition elements".

  • 2)

    Why is there a variation of atomic andionic size as we move from Sc to Zn?

  • 3)

    Write a note on the ionization enthalpy of transition elements.

  • 4)

    Write a short note on the oxidation states of 3d series elements.

  • 5)

    How are materials classified based on their magnetic properties?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain the oxidising and reducing property of SO2·

  • 2)

    Explain the oxidising property of sulphuric acid.

  • 3)

    How does sulphuric acid react with metals at various conditions.

  • 4)

    How is chlorine manufactured by the electrolysis of brine.

  • 5)

    Explain the bleaching action of Chlorine.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What are the properties of inter halogen compounds?

  • 2)

    (i) \(\mathrm{PCl}_{5}+\mathrm{Ag} \longrightarrow \text { ? } \)
    (ii) \(\mathrm{AgCl}_{(s)}+\mathrm{NH}_{3(\mathrm{aq})} \longrightarrow ? \)
    (iii) \(\mathrm{PCl}_{3} \stackrel{\text { Moist air }}{\longrightarrow} \text { ? } \)
    (iv) \(\mathrm{PCl}_{5} \stackrel{\text { Moist air }}{\longrightarrow} ? \)
    (v) \(\mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{HCl} \longrightarrow ?\)

  • 3)

    An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda to give B which is having rotten fish odour. A reacts with chlorine to give C which has a pungent odour Identify A, B and C. Write the reactions.

  • 4)

    An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273K. Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. Breasts with SO3 and reduces it to SO2 B has a pyramidal shape. C has trigonal bipyramidal shape by sp3d hybridisation. Identify the element A and the compounds B and C. Write the reactions.

  • 5)

    An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compound B on hydrolysis gives a dibasic acid C. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the elements A compounds B, C and D. Write the reactions.

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain concentration by magnetic separation with diagram.

  • 2)

    Explain refining of nickel by mond's process

  • 3)

    List out the application of aluminum.

  • 4)

    How can you separate alumina from silica in a bauxite ore.

  • 5)

    Write short note on the following:
    (i) The process in which no external reducing agent is used.
    (ii) The process which is used for highly electro positive metal.
    (iii) Write the equation involved in the thermite process.

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Explain froth flotation, with diagram.

  • 2)

    In the extraction of copper, explain the smelting process.

  • 3)

    Explain refining of titanium by Van-Arkel method.

  • 4)

    List the applications of iron.

  • 5)

    What is zone refining? Describe the principle involved in the purification of the metal by this method.

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Among the following, one does not belong to calcination, Pick the odd one out.

  • 2)

    S-S bond is present in _______.

  • 3)

    Which of the following is coloured due to charge transfer?

  • 4)

    The spin only magnetic moment of [Mnfsr4]2- is 5.9 BM. Geometry of the complex ion is _______.

  • 5)

    Which of the following is characteristic of ionic solids?

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    A crystal which has the same unit cell and contains the same lattice points throughout the crystal is_________.

  • 2)

    In the acid hydrolysis of an ester, what is the time taken for complete hydrolysis?

  • 3)

    pH of a solution can be kept constant with the help of __________ solution.

  • 4)

    SHE is _______.

  • 5)

    Argyrol is_______.

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What is meant by concentration?

  • 2)

    Mention the physical properties of boranes.

  • 3)

    Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?

  • 4)

    Why lanthanoids are called f block elements?

  • 5)

    Write the IUPAC name of the complex.

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    What are anionic & cationic complex? Give an example.

  • 2)

    What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?

  • 3)

    Explain how will you find activation energy of a reaction by graphical method.

  • 4)

    Give an example of secondary cell.

  • 5)

    Why colloidal system in gas in gas does not exist?

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    Before reduction, the ore is first converted into the oxide of metal of interest. Give reason

  • 2)

    How is aluminum chloride prepared from aluminum?

  • 3)

    Why do noble gases form compounds with fluorine and oxygen only?

  • 4)

    What are the general properties of f-block elements? (Lanthanides and Actinides)
    (i) Electronic configuration
    (ii) Oxidation state
    (iii) Radii of tripositive ions.

  • 5)

    Aqueous copper sulphate solution (blue) gives
    (i) a green precipitate with aqueous potassium fluoride.
    (ii) a bright green solution with aqueous potassium chloride. Explain these experimental results.

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    State Bragg's law.

  • 2)

    What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

  • 3)

    What is Henderson equation?

  • 4)

    What is salt bridge? How is it represented in a cell diagram?

  • 5)

    Wha tare catalyticpoisons? Give an example.

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software View & Read

  • 1)

    In the extraction of copper, explain the smelting process.

  • 2)

    How are silicates classified? Give an example for each type of silicate.

  • 3)

    Mention the uses of helium.

  • 4)

    Why is there a variation of atomic andionic size as we move from Sc to Zn?

  • 5)

    Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
    (i) K[Cr(H2O)2 (C2O4)2]
    (ii) [Co(en)3]CI3
    (iii) [Co(NH3)5(NO2)](NO3)2
    (iv) [Pt (NH3)(H2O)CI2]

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software View & Read

  • 1)

    An element with molar mass 2.7 x 10-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 103 kg m-3, What is the nature of the cubic unit cell?

  • 2)

    A first order reaction completes 25% of the reaction in 100 mins. What are the rate constant and half life values of the reaction?

  • 3)

    Derive Henderson - Hasselbalch equation

  • 4)

    Derive a relationship between dissociation constant Ka and molar conductivity \({ \Lambda }_{ m }\)

  • 5)

    Explain the various chemical methods by which colloids can be prepared.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain zone refining process with an example.

  • 2)

    Using the Ellingham diagram,
    (A) Predict the conditions under which
    (i) Aluminium might be expected to reduce magnesia.
    (ii) Magnesium could reduce alumina.
    (B) it is possible to reduce Fe2O3 by coke at a temperature around 1200K

  • 3)

    Explain the electrometallurgy of aluminium.

  • 4)

    Explain the following terms with suitable examples.
    (i) Gangue
    (ii) slag

  • 5)

    Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain zone refining process with an example.

  • 2)

    Using the Ellingham diagram,
    (A) Predict the conditions under which
    (i) Aluminium might be expected to reduce magnesia.
    (ii) Magnesium could reduce alumina.
    (B) it is possible to reduce Fe2O3 by coke at a temperature around 1200K

  • 3)

    Give the uses of zinc.

  • 4)

    Explain the electrometallurgy of aluminium.

  • 5)

    Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give the uses of silicones.

  • 2)

    Describe the structure of diborane.

  • 3)

    Give one example for each of the following
    (i) icosogens
    (ii) Tetragens
    (iii) pnictogens
    (iv) chalcogens

  • 4)

    Write a note on metallic nature of p-block elements.

  • 5)

    Complete the following reactions.
    a. \(B(OH)_3 + NH_3\longrightarrow \)
    b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
    c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
    d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
    e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
    f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
    g. \(2SiCl_{ 4 }+NH\)3
    h. SiCl4 + 4C2H5OH \(\rightarrow\)
    i. 2\(B+6NaOH\longrightarrow \)
    j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give the uses of silicones.

  • 2)

    AlCl3 behaves like a lewis acid. Substantiate this statement.

  • 3)

    Describe the structure of diborane.

  • 4)

    Write a short note on hydroboration.

  • 5)

    Write a note on metallic nature of p-block elements.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.

  • 2)

    How will you prepare chlorine in the laboratory?

  • 3)

    Give the uses of sulphuric acid.

  • 4)

    Write the valence shell electronic configuration of group-15 elements.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give the uses of sulphuric acid.

  • 2)

    Give a reason to support that sulphuric acid is a dehydrating agent.

  • 3)

    Write the reason for the anomalous behaviour of Nitrogen.

  • 4)

    Write the molecular formula and structural formula for the following molecules.
    a) Nitric acid
    b) Dinitrogen pentoxide
    c) phosphoric acid (PTA)
    d) phosphine

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are interstitial compounds?

  • 2)

    Calculate the number of unpaired electrons in Ti3+ , Mn2+ and calculate the spin only magnetic moment.

  • 3)

    Write the electronic configuration of Ce4+ and Co2+.

  • 4)

    Compare the ionization enthalpies of first series of the transition elements.

  • 5)

    Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

  • 2)

    Which is more stable? Fe3+ or Fe2+ - explain.

  • 3)

    Explain the variation in E0M3+/M2+  3d series.

  • 4)

    Compare lanthanoids and actinoids.

  • 5)

    Explain why Cr2+ is strongly reducing while Mn3+ is strongly oxidizing.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give an example for complex of the type [Ma2b2c2] where a, b, c are monodentate ligands and give the possible isomers.

  • 2)

    In an octahedral crystal field, draw the figure to show splitting of d orbitals

  • 3)

    Write briefly about the applications of coordination compounds in volumetric analysis

  • 4)

    Give the difference between double salts and coordination compounds.

  • 5)

    [Ni(CN)4]2- is diamagnetic, while [NiCl4]2- is paramagnetic, explain using crystal field theory. 

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give one test to differentiate [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl.

  • 2)

    What is linkage isomerism? Explain with an example.

  • 3)

    Classify the following ligands based on the number of donor atoms.
    a) NH3
    b) en
    c) ox2-
    d) pyridine

  • 4)

    Write the postulates of Werner’s theory.

  • 5)

    Why tetrahedral complexes do not exhibit geometrical isomerism.

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain Schottky defect.

  • 2)

    Calculate the number of atoms in a fcc unit cell.

  • 3)

    Why ionic crystals are hard and brittle?

  • 4)

    What is the two dimensional coordination number of a molecule in square close packed layer?

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write short note on metal excess and metal deficiency defect with an example.

  • 2)

    Explain AAAA and ABABA and ABCABC type of three dimensional packing with the help of neat diagram.

  • 3)

    Calculate the percentage efficiency of packing in case of body centered cubic crystal.

  • 4)

    Experiment shows that Nickel oxide has the formula Ni0.96.O1.00. What fraction of Nickel exists as of Ni2+ and Ni3+ ions?

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The decomposition of Cl2O7 at 500K in the gas phase to Cl2 and O2 is a first order reaction. After 1 minute at 500K, the pressure of Cl2O7 falls from 0.08 to 0.04 atm. Calculate the rate constant in s-1

  • 2)

    Explain pseudo first order reaction with an example.

  • 3)

    A gas phase reaction has energy of activation 200 kJ mol-1. If the frequency factor of the reaction is 1.6 x 1013s-1. Calculate the rate constant at 600 K.(e-40.09 = 3.8 x 10-48)

  • 4)

    A first order reaction takes 8 hours for 90% completion. Calculate the time required for 80% completion. (log 5 = 0.6989 ; log10 = 1)

  • 5)

    Show that in case of first order reaction, the time required for 99.9% completion is nearly ten times the time required for half completion of the reaction.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    For a reaction x + y + z\(\longrightarrow \) products the rate law is given by rate =k[x]3/2[y]1/2. What is the overall order of the reaction and what is the order of the reaction with respect to z.

  • 2)

    Write Arrhenius equation and explains the terms involved.

  • 3)

    Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of an ester at different temperatures is given below.

    t(min) 0 20 40 60
    v (ml) 20.2 25.6 29.5 32.8 50.4

    Show that the reaction is the first order reactions.

  • 4)

    Identify the order for the following reactions
    (i) Rusting of Iron
    (ii) Radioactive disintegration of 92U238
    (iii) 2A+3B⟶ products ;rate = k[A]1/2[B]2

  • 5)

    For the reaction 2x+y ⟶ L find the rate law from the following data. 

    [x]
    (min)
    [y]
    (min)
    rate
    (ms-1)
    0.2 0.02 0.15
    0.4 0.02 0.30
    0.4 0.08 1.20

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Define pH.

  • 2)

    50ml of 0.05M HNO3 is added to 50ml of 0.025M KOH. Calculate the pH of the resultant solution.

  • 3)

    Calculate the extent of hydrolysis and the pH of 0.1 M ammonium acetate Given that \(K_{a}=K_{b}=1.8\times10^{-5}\)

  • 4)

    A solution of 0.10M of a weak electrolyte is found to be dissociated to the extent of 1.20% at 25oC. Find the dissociation constant of the acid.

  • 5)

     Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. Ka for acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Derive an expression for Ostwald’s dilution law.

  • 2)

    Calculate the pH of 1.5\(\times\)10-3 M solution of Ba(OH)2

  • 3)

    The Ka value for HCN is 10-9. What is the pH of 0.4M HCN solution?

  • 4)

    Derive an expression for the hydrolysis constant and degree of hydrolysis of salt of strong acid and weak base.

  • 5)

    Calculate the pH of 0.1M CH3COOH solution. Dissociation constant of acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Arrange the following solutions in the decreasing order of specific conductance.
    i) 0.01M KCl
    ii) 0.005M KCl
    iii) 0.1M KCl
    iv) 0.25M KCl
    v) 0.5M KCl

  • 2)

    0.1M NaCl solution is placed in two different cells having cell constant 0.5 and 0.25 cm-1 respectively. Which of the two will have greater value of specific conductance.

  • 3)

    Can Fe3+ oxidises Bromide to bromine under standard conditions?
    Given: \({ E }_{ { Fe }^{ 3+ }|{ Fe }^{ 2+ } }^{ 0 }=0.771V\)\(\\ { E }^{0}_{ { Br }_{ 2 }|{ Br }^{ - } }=1.09V\).

  • 4)

    Two metals M1 and M2 have reduction potential values of -xV and +yV respectively. Which will liberate H2 and H2SO4.

  • 5)

    A solution of silver nitrate is electrolysed for 20 minutes with a current of 2 amperes. Calculate the mass of silver deposited at the cathode.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    The conductivity of a 0.01M solution of a 1 :1 weak electrolyte at 298K is 1.5\(\times\)10-4 S cm−1.
    i) molar conductivity of the solution
    ii) degree of dissociation and the dissociation constant of the weak electrolyte
    Given that
    \(\lambda^{0}_{cation}=248.2 \ S\) cm2 mol-1
    \(\lambda^{0}_{anlon}=51.8 \ S\) cm2 mol-1

  • 2)

    Why is AC current used instead of DC in measuring the electrolytic conductance?

  • 3)

    A current of 1.608A is passed through 250 mL of 0.5M solution of copper sulphate for 50 minutes. Calculate the strength of Cu2+ after electrolysis assuming volume to be constant and the current efficiency is 100%.

  • 4)

    Is it possible to store copper sulphate in an iron vessel for a long time?
    Given : \(E^{0}_{Cu^{2+}|Cu} = 0.34\) V and \(E^{0}_{Fe^{2+}|Fe} = -0.44\)V.

  • 5)

    Reduction potential of two metals M1 and M2 are \(E^{0}_{M^{2+}_{1}|M_{1}} = -2.3V\) and \(E^{0}_{M^{2+}_{1}|M_{1}} = 0.2V\) Predict which one is better for coating the surface of iron. Given : \(\mathrm{E}_{\mathrm{Fe}^{2+} \mid \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V}\)

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.

  • 2)

    What is the difference between a sol and a gel?

  • 3)

    Addition of Alum purifies water. Why?

  • 4)

    What are enzymes? Write a brief note on the mechanism of enzyme catalysis.

  • 5)

    Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What happens when a colloidal sol of Fe(OH)3 and As2S3 are mixed?

  • 2)

    Why are lyophillic colloidal sols are more stable than lyophobic colloidal sol.

  • 3)

    What are the factors which influence the adsorption of a gas on a solid?

  • 4)

    What do you mean by activity and selectivity of catalyst?

  • 5)

    Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

  • 2)

    Explain Kolbe’s reaction

  • 3)

    Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.

  • 4)

    How are the following conversions effected
    i) benzylchloride to benzylalcohol
    ii) benzyalalcohol to benzoic acid

  • 5)

    Compound (A) C6H12O2 on reduction with LiAlH4 yields two compounds B and C. The compound (B) on oxidation gave (D) which on treatment with aqueous alkali and subsequent heating furnished E. The latter on catalytic hydrogenation gave (C). Compound (D) on oxidation gave monobasic acid (molecular formula weight = 60). Deduce the structure of (A), (B), (C), (D) and (E).

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How is phenol prepared from
    i) chloro benzene
    ii) isopropyl benzene

  • 2)

    Write the chemical equation for Williamson synthesis of 2-ethoxy – 2- methyl pentane starting from ethanol and 2 – methyl pentan -2-ol.

  • 3)

    What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane

  • 4)

    When tertiary butyl alcohol and 1-butanol are separately treated with a few drops of KMnO4, in one case only the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction and what is that brown precipitate?

  • 5)

    Give the Grignard reagent and carbonyl compound that can be used to prepare.
    (a) CH3-CH2-CH2-OH
    (b) (CH3)2C(OH)CH2CH2CH3
    (c) C6H5CH2CH(OH)CH3

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Identify A, B, C and D
    \(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)

  • 2)

    An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br2/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.

  • 3)

    How will you convert benzaldehyde into the following compounds?
    (i) benzophenone
    (ii) benzoic acid
    (iii) α-hydroxyphenylaceticacid.

  • 4)

    What is the action of HCN on
    (i) propanone
    (ii) 2,4-dichlorobenzaldehyde
    iii) ethanal

  • 5)

    A carbonyl compound A having molecular formula C5H10O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How will you distinguish between primary secondary and tertiary alphatic amines.

  • 2)

    Account for the following
    i. Aniline does not undergo Friedel – Crafts reaction
    ii. Diazonium salts of aromatic amines are more stable than those of aliphatic amines
    iii. pKb of aniline is more than that of methylamine
    iv. Gabriel phthalimide synthesis is preferred for synthesising primary amines.
    v. Ethylamine is soluble in water whereas aniline is not
    vi. Amines are more basic than amides
    vii.Although amino group is o – and p – directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m – nitroaniline.

  • 3)

    Arrange the following
    i. In increasing order of solubility in water, C6H5 NH2, (C2H5)2NH, C2H5NH2
    ii. In increasing order of basic strength
    a) aniline, p- toludine and p – nitroaniline
    b) C6H5 NH2, C6H5 NHCH3, C6H5NH2, p-Cl-C6- H4-NH2
    iii. In decreasing order of basic strength in gas phase
    (C2H5)NH2, (C2H5)NH, (C2H5)5N and NH3
    iv. In increasing order of boiling point
    C6H5OH, (CH3)2NH, C2H5NH2
    v. In decreasing order of the pKb values
    C2H5NH2, C6H5NHCH3.(C2H5)2 NH and CH3NH2
    vi. Increasing order of basic strength
    C2H5NH2,C6H5N(CH3)2, (C2H5)2 NH and CH3NH2
    vii. In decreasing order of basic strength

  • 4)

    How will you prepare propan – 1- amine from
    i) butane nitrile
    ii) propanamide
    ii) 1- nitropropane

  • 5)

    Identify A,B,and C
    CH3- NO2 \(\overset { { L }_{ 1 }{AlH }_{ 4 } }{ \underset { {} }{ \longrightarrow } }\) A  \(\overset { { 2CH_3 }{Ch_2Br } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {H}_{ 2 }{SO}_{ 4 } }{ \underset { {} }{ \longrightarrow } } \) C

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give two difference between Hormones and vitamins.

  • 2)

    Write a note on denaturation of proteins.

  • 3)

    Why carbohydrates are generally optically active.

  • 4)

    How are vitamins classified?

  • 5)

    What are harmones? Give examples

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Write a note on denaturation of proteins.

  • 2)

    What are reducing and non – reducing sugars?

  • 3)

    Why carbohydrates are generally optically active.

  • 4)

    Classify the following into monosaccharides, oligosaccharides and polysaccharides.
    i) Starch
    ii) fructose
    iii) sucrose
    iv) lactose
    iv) maltose

  • 5)

    How are vitamins classified?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are drugs? How are they classified.

  • 2)

    How the tranquilizers work in body.

  • 3)

    Write the structural formula of aspirin.

  • 4)

    Explain the mechanism of cleansing action of soaps and detergents.

  • 5)

    Which sweetening agent are used to prepare sweets for a diabetic patient?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Who do soaps not work in hard water?

  • 2)

    What are drugs? How are they classified.

  • 3)

    How the tranquilizers work in body.

  • 4)

    Write the structural formula of aspirin.

  • 5)

    Explain the mechanism of cleansing action of soaps and detergents.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Describe the role of the following in the process mentioned.
    (i) Silica in the extraction of copper.
    (ii) Cryolite in the extraction of aluminium.
    (iii) Iodine in the refining of Zirconium.
    (iv) Sodium cyanide in froth floatation.

  • 2)

    Explain the principle of electrolytic refining with an example.

  • 3)

    The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

  • 4)

    Give the limitations of Ellingham diagram.

  • 5)

    Write a short note on electrochemical principles of metallurgy.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How will you identify borate radical?

  • 2)

    Write a note on zeolites.

  • 3)

    How will you convert boric acid to boron nitride?

  • 4)

    A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). Identify A, B and C.

  • 5)

    CO is a reducing agent. Justify with an example.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give two equations to illustrate the chemical behaviour of phosphine.

  • 2)

    What happens when PCl5 is heated?

  • 3)

    Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.

  • 4)

    Deduce the oxidation number of oxygen in hypofluorous acid – HOF.

  • 5)

    What type of hybridisation occur in
    a) BrF5
    b) BrF3

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Give two equations to illustrate the chemical behaviour of phosphine.

  • 2)

    Give a reaction between nitric acid and a basic oxide.

  • 3)

    Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.

  • 4)

    Deduce the oxidation number of oxygen in hypofluorous acid – HOF.

  • 5)

    Complete the following reactions.
    \(1. \mathrm{NaCl}+\mathrm{MnO}_{2}+\mathrm{4H}_{2} \mathrm{SO}_{4} \longrightarrow \)
    \(2. \mathrm{NaNO}_{2}+\mathrm{HCl} \longrightarrow \)
    \(3.\mathrm{P}_{4}+\mathrm{3NaOH}+\mathrm{3H}_{2} \mathrm{O} \longrightarrow \)
    \(4. \mathrm{AgNO}_{3}+\mathrm{PH}_{3} \longrightarrow \)
    \(5. \mathrm{Mg}+\mathrm{10HNO}_{3} \longrightarrow \)
    \(6. \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} \)
    \(7. \mathrm{Cu}+Con. \ Hot \ \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\)
    \(8. \mathrm{Sb}+\mathrm{Cl}_2 \longrightarrow \)
    \(9. \mathrm{HBr}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \)
    \(10. \mathrm{XeF}_6+\mathrm{H}_2 \mathrm{O} \longrightarrow \)
    \(11. \mathrm{XeO}_6{ }^{4-}+\mathrm{Mn}^{2+}+\mathrm{H}^{+} \longrightarrow \)
    \(12. \mathrm{XeOF}_4+\mathrm{SiO}_2 \longrightarrow \)
    \(13. \mathrm{Xe}+\mathrm{F}_2 \frac{\mathrm{Ni} / 200 \mathrm{~atm}}{400^{\circ} \mathrm{C}}\)
    .

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Out of Lu(OH)3 and La(OH)3 which is more basic and why?

  • 2)

    Why do zirconium and Hafnium exhibit similar properties?

  • 3)

    The E0M2+/M value for copper is positive. Suggest a possible reason for this.

  • 4)

    Describe the variable oxidation state of 3d series elements.

  • 5)

    Why first ionization enthalpy of chromium is lower than that of zinc?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Why europium (II) is more stable than Cerium (II)?

  • 2)

    Which is stronger reducing agent Cr2+ or Fe2+?

  • 3)

    Predict which of the following will be coloured in aqueous solution Ti2+, V3+, Sc4+, Cu+, Sc3+, Fe3+, Ni2+ and Co3+

  • 4)

    Which metal in the 3d series exhibits +1 oxidation state most frequently and why?

  • 5)

    Transition metals show high melting points. Why?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What are hydrate isomers? Explain with an example.

  • 2)

    What is crystal field stabilization energy (CFSE)?

  • 3)

    Discuss briefly the nature of bonding in metal carbonyls.

  • 4)

    On the basis of VB theory explain the nature of bonding in [Co(C2O4)3]3-

  • 5)

    Write the oxidation state, coordination number , nature of ligand, magnetic property and electronic configuration in octahedral crystal field for the complex K4[Mn(CN)6]

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    Explain optical isomerism in coordination compounds with an example.

  • 2)

    What is crystal field splitting energy?

  • 3)

    A solution of [Ni(H2O)6]2+ is green, whereas a solution of [Ni(CN)4]2- is colorless -Explain

  • 4)

    What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?

  • 5)

    What are the limitations of VB theory?

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    What is meant by the term “coordination number”? What is the coordination number of atoms in a bcc structure?

  • 2)

    Aluminium crystallizes in a cubic close packed structure. Its metallic radius is 125pm. calculate the edge length of unit cell.

  • 3)

    KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K+ and F in KF. (given : density of KF is 248 g cm-3)

  • 4)

    Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?

  • 5)

    Write a note on Frenkel defect.

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software View & Read

  • 1)

    An element has bcc structure with a cell edge of 288 pm. The density of the element is 7.2 g cm-3. How many atoms are present in 208 g of the element.

  • 2)

    If NaCl is doped with 10-2 mol percentage of strontium chloride, what is the concentration of  cation vacancy?

  • 3)

    KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K+ and F in KF. (given : density of KF is 248 g cm-3)

  • 4)

    An atom crystallizes in fcc crystal lattice and has a density of 10 gcm−3 with unit cell edge length of 100pm. Calculate the number of atoms present in 1 g of crystal.

  • 5)

    Sodium metal crystallizes in bcc structure with the edge length of the unit cell 4.3 x 10-8 cm. Calculate the radius of sodium atom.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software View & Read

  • 1)

    How do nature of the reactant influence rate of reaction.

  • 2)

    The half life of the homogeneous gaseous reaction SO2Cl2 → SO2 + Cl2 which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO2Cl2 to be reduced to 1% of the initial value?

  • 3)

    A zero order reaction is 20% complete in 20 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

  • 4)

    A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

  • 5)

    Rate constant k of a reaction varies with temperature T according to the following Arrhenius equation  \(\log K=\log A-\frac { { E }_{ a } }{ 2.303R } \left( \frac { 1 }{ T } \right) \)Where Ea is the activation energy. When a graph is plotted for log k Vs \(\frac{1}{T}\) a straight line with a slope of -4000K is obtained. Calculate the activation energy.

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    An element with molar mass 2.7 x 10-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 103 kg m-3, What is the nature of the cubic unit cell?

  • 2)

    A first order reaction completes 25% of the reaction in 100 mins. What are the rate constant and half life values of the reaction?

  • 3)

    Derive Henderson - Hasselbalch equation

  • 4)

    Derive a relationship between dissociation constant Ka and molar conductivity \({ \Lambda }_{ m }\)

  • 5)

    Explain the various chemical methods by which colloids can be prepared.

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    In the extraction of copper, explain the smelting process.

  • 2)

    How are silicates classified? Give an example for each type of silicate.

  • 3)

    Mention the uses of helium.

  • 4)

    Why is there a variation of atomic andionic size as we move from Sc to Zn?

  • 5)

    Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
    (i) K[Cr(H2O)2 (C2O4)2]
    (ii) [Co(en)3]CI3
    (iii) [Co(NH3)5(NO2)](NO3)2
    (iv) [Pt (NH3)(H2O)CI2]

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    State Bragg's law.

  • 2)

    What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

  • 3)

    What is Henderson equation?

  • 4)

    What is salt bridge? How is it represented in a cell diagram?

  • 5)

    Wha tare catalyticpoisons? Give an example.

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Before reduction, the ore is first converted into the oxide of metal of interest. Give reason

  • 2)

    How is aluminum chloride prepared from aluminum?

  • 3)

    Why do noble gases form compounds with fluorine and oxygen only?

  • 4)

    What are the general properties of f-block elements? (Lanthanides and Actinides)
    (i) Electronic configuration
    (ii) Oxidation state
    (iii) Radii of tripositive ions.

  • 5)

    Aqueous copper sulphate solution (blue) gives
    (i) a green precipitate with aqueous potassium fluoride.
    (ii) a bright green solution with aqueous potassium chloride. Explain these experimental results.

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are anionic & cationic complex? Give an example.

  • 2)

    What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?

  • 3)

    Explain how will you find activation energy of a reaction by graphical method.

  • 4)

    Give an example of secondary cell.

  • 5)

    Why colloidal system in gas in gas does not exist?

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is meant by concentration?

  • 2)

    Mention the physical properties of boranes.

  • 3)

    Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?

  • 4)

    Why lanthanoids are called f block elements?

  • 5)

    Write the IUPAC name of the complex.

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    A crystal which has the same unit cell and contains the same lattice points throughout the crystal is_________.

  • 2)

    In the acid hydrolysis of an ester, what is the time taken for complete hydrolysis?

  • 3)

    pH of a solution can be kept constant with the help of __________ solution.

  • 4)

    SHE is _______.

  • 5)

    Argyrol is_______.

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Among the following, one does not belong to calcination, Pick the odd one out.

  • 2)

    S-S bond is present in _______.

  • 3)

    Which of the following is coloured due to charge transfer?

  • 4)

    The spin only magnetic moment of [Mnfsr4]2- is 5.9 BM. Geometry of the complex ion is _______.

  • 5)

    Which of the following is characteristic of ionic solids?

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain froth flotation, with diagram.

  • 2)

    In the extraction of copper, explain the smelting process.

  • 3)

    Explain refining of titanium by Van-Arkel method.

  • 4)

    List the applications of iron.

  • 5)

    What is zone refining? Describe the principle involved in the purification of the metal by this method.

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain concentration by magnetic separation with diagram.

  • 2)

    Explain refining of nickel by mond's process

  • 3)

    List out the application of aluminum.

  • 4)

    How can you separate alumina from silica in a bauxite ore.

  • 5)

    Write short note on the following:
    (i) The process in which no external reducing agent is used.
    (ii) The process which is used for highly electro positive metal.
    (iii) Write the equation involved in the thermite process.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are the properties of inter halogen compounds?

  • 2)

    (i) \(\mathrm{PCl}_{5}+\mathrm{Ag} \longrightarrow \text { ? } \)
    (ii) \(\mathrm{AgCl}_{(s)}+\mathrm{NH}_{3(\mathrm{aq})} \longrightarrow ? \)
    (iii) \(\mathrm{PCl}_{3} \stackrel{\text { Moist air }}{\longrightarrow} \text { ? } \)
    (iv) \(\mathrm{PCl}_{5} \stackrel{\text { Moist air }}{\longrightarrow} ? \)
    (v) \(\mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{HCl} \longrightarrow ?\)

  • 3)

    An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda to give B which is having rotten fish odour. A reacts with chlorine to give C which has a pungent odour Identify A, B and C. Write the reactions.

  • 4)

    An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273K. Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. Breasts with SO3 and reduces it to SO2 B has a pyramidal shape. C has trigonal bipyramidal shape by sp3d hybridisation. Identify the element A and the compounds B and C. Write the reactions.

  • 5)

    An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compound B on hydrolysis gives a dibasic acid C. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the elements A compounds B, C and D. Write the reactions.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain the oxidising and reducing property of SO2·

  • 2)

    Explain the oxidising property of sulphuric acid.

  • 3)

    How does sulphuric acid react with metals at various conditions.

  • 4)

    How is chlorine manufactured by the electrolysis of brine.

  • 5)

    Explain the bleaching action of Chlorine.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Justify the following statement.
    "Elements of the first transition series possess many properties different from those of heavier transition elements".

  • 2)

    Why is there a variation of atomic andionic size as we move from Sc to Zn?

  • 3)

    Write a note on the ionization enthalpy of transition elements.

  • 4)

    Write a short note on the oxidation states of 3d series elements.

  • 5)

    How are materials classified based on their magnetic properties?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
    (i) K[Cr(H2O)2 (C2O4)2]
    (ii) [Co(en)3]CI3
    (iii) [Co(NH3)5(NO2)](NO3)2
    (iv) [Pt (NH3)(H2O)CI2]

  • 2)

    What is meant by stability of a co-ordination compound in solution? State the factors which govern stability of complexes.

  • 3)

    What are the main assumptions of Valence Bond Theory? Explain.

  • 4)

    How are metal carbonyls classified depending on the number of metal atoms?

  • 5)

    Give the IUPAC name for the following compounds.
    (i) [Ag(NH3)2]CI
    (ii) K3[Fe(CN)5NO]
    (ill) [Cr(PPh3)(CO)3]
    (iv) [Ag(NH3)2]+
    (v) [FeF6]4-

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    For the complex [NiCI4]2- write (i) the IUPAC name (ii) The hybridisation type (iii) The shape of the complex

  • 2)

    How are Co-ordination compounds classified?

  • 3)

    What are the salient feature of crystal field theory?

  • 4)

    How are metal carbonyls classified based on the structure?

  • 5)

    Give the structure for the following compounds.
    (i) pentaamminechlorocobalt (III) ion
    (ii) Triamminetrinitrito- k N cobalt (III)
    (ill) tetraammineaquabromidooobalt(III)nitrate
    (iv) Dichloridobisethane-(1,2-diamine) cobalt (lIl) chloride
    (v) Tetraamminecopper (lI) sulphate

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.

  • 2)

    What are the general characteristics of solids?

  • 3)

    An element with molar mass 2.7 x 10-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 103 kg m-3, What is the nature of the cubic unit cell?

  • 4)

    Explain the following: Similarities and differences between metallic and ionic crystals.

  • 5)

    What are stoichiometric defects in ionic solids? Explain

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body - centre. What is the formula of the compound? What is the coordination numbers of P and Q?

  • 2)

    What are molecular solids? Explain the types of molecular solids.

  • 3)

    How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.

  • 4)

    How are crystals classified?

  • 5)

    Write note on impurity defect?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    For the reaction 2A + B ⟶ A2B. The rate = k [A] [B]2 with k = 2.0 x 10-6 mol? L2 S-1. Calculate the initial rate of the reaction, when [A] = 0.1 mol L-1, [B] = 0.2 mol L-1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L-1

  • 2)

    In a pseudo first order hydrolysis of ester in water, the following results were obtained.

    1 0 30 60 90
    [Ester]mol L-1 0.55 0.31 0.17 0.085

    (i) Calculate the average rate of reaction between the time interval 30 to 60 seconds.
    (i) Calculate the pseudo first order rate constant for the hydrolysis of ester.

  • 3)

    Write an account of the Arrhenius equation for rates of chemical reactions. 

  • 4)

    For the reaction R - P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and second.

  • 5)

    A first order reaction laws on rate constant 1.15 x 10-3 S-1. How long will 5 g of this reactant take to reduce to 3g?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    A first order reaction laws on rate constant 1.15 x 10-3 S-1. How long will 5 g of this reactant take to reduce to 3g?

  • 2)

    Reaction is first order in A and second in B.
    (i) Write the different rate equation.
    (ii) How is the rate affected on increasing the concentration of B three times?
    (iii) How is the rate affected when the concentrations of both A and B are doubled?

  • 3)

    Rate constant of a first order reaction is 0.45 sec-1, calculate its half life.

  • 4)

    If 30% of a first order reaction is completed in 12 mins, what percentage will be completed in 65.33 mins?

  • 5)

    The half life period of first order reactions is 10 mins. What percentage of the reactant will remain after one hour?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Calculate the pH of 0.02 m Ba(OH)2 aqueous solution assuming Ba(OH)2 as a strong electrolyte.

  • 2)

    Calculate the pH of 0.001 M HCI solution.

  • 3)

    If a solution has a pH of 7.41, determine its H+ concentration.

  • 4)

    The degree of dissociation of acetic acid in 0.1 Msolution is 0.04. Calculate Ka for acetic acid. Where a is the degree of dissociation, C is the concentration of the acid in moles/ lit.

  • 5)

    A 0.02 M solution of a weak mono basic acid is 5% ionised. Calculate the ionisation constant of the acid.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    A buffer solution containing 0.1 mole of ammonium hydroxide and 0.15 mole of ammonium chloride per litre of the solution. Calculate the pH of the buffer solution. Kb for ammonium hydroxide is 1.8 x 10-5.

  • 2)

    Calculate the pH of 0.1 M NH4OH if Kb = 1.75 x 10-5

  • 3)

    Explain buffer action in an acidic buffer.

  • 4)

    On hydrolysis of salts of strong acid and strong base, the solution obtained is neutral. Justify your answer with a suitable example

  • 5)

    Derive the hydrolysis constant for the hydrolysis of salt of strong base and weak acid. Deduce its pH.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Calculate the emf of the cell Zn/ZnO2, OH-, HgO/Hg given that Eo values of OH-, ZnO and OH-, HgO/Hg half cells are -1.216 V and 0.098 V respectively.

  • 2)

    Calculate the emf of the cell having the cell reaction 2Ag+ + Zn ⇌ 2Ag + Zn2+ and Eocell = 1.56 V at 25°C when concentration of Zn2+ = 0.1 M and Ag+ = 10 M in the solution.
    \([{ E }_{ cell }={ E }_{ cell }^{ o }-\frac { RT }{ nF } In\frac { [{ Zn }^{ 2+ }] }{ [{ Ag] }^{ 2 } } ]\)

  • 3)

    How will you determine the conductivity of an electrolytic solution using a wheatstone, bridge?

  • 4)

    Explain SHE as a reference electrode.

  • 5)

    Write the electrochemical mechanism of corrosion.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The standard reduction potential for the reaction Sn4+ + 2e- ⟶ Sn2+ is + 0.15v. Calcuate the free energy change of the reaction.

  • 2)

    The emf of the cell Cd/CdCl2, 25H2O / AgCI(s) Ag Eo is 0.675 V. Calculate of the cell reaction.

  • 3)

    The emf of the half cell Cu2+(aq)/ Cu(s). containing 0.01 M Cu2+solution is + 0.301V. Calculate the standard emf of the half cell

  • 4)

    Calculate the standard emf of the cell having the standard free energy change of the cell reaction is -64.84 kJ for 2 electrons transfer.

  • 5)

    The equilibrium constant of cell reaction: Ag(s) + Fe3+ ⇌ Fe2+ + Ag+ is 0.335 at 25°C. Calculate the standard emf of the cell AgI Ag+; Fe3+, Fe2+/Pt. Calculate Eo of the half cell Fe3+, Fe2+/Pt is 0.7791 V. Calculate Eo of Fe3+, Fe2+/ Pt half cell.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Write the characteristics of catalysts.

  • 2)

    Write a note on phase transfer catalysis.

  • 3)

    Explain the various chemical methods by which colloids can be prepared.

  • 4)

    Explain the electrical property of colloids with a neat diagram. (or) Write a note on Helmholta electrical double layer.

  • 5)

    Write any five applications of colloids in day - to day life.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write the characteristics of adsorption.

  • 2)

    Write a note on Freundlich adsorption isotherm.

  • 3)

    Give the special characteristics of enzyme catalysed reactions.

  • 4)

    Explain the following
    (i) Reactant selectivity
    (ii) Transition state selectivity
    (iii) Product selectivity 

  • 5)

    Explain electrodialysis

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    An organic compound (A) C2H6O liberates hydrogen on treatment with metallic sodium. (A) on mild oxidation gives (B) C2H4O which answers iodoform test. (B) when treated with cone. H2SO4 undergoes polymerisation to give (C) a cyclic compound. Identify (A) (B) and (C) and explain the reactions.

  • 2)

    An organic compound A of molecular formula C3H6O on reduction with LiAlH4 gives B. Compound B gives blue colour in Victor Meyer's test and also forms a chloride C with SOCl2. The chloride on treatment with alcoholic KOH gives D. Identify A, B, C and D and explain the reactions.

  • 3)

    An organic compound (A) of molecular formula C3H8O2 is obtained as by-product in the manufacture of soap. Compound (A) on heating with P2O5 gives an unsaturated compound (B) of molecular formula C3H4O. Compound (A) with well cooled mixture of Conc.H2SO4 and fuming HNO3 form compound (C) which is an explosive. Identify A, B and C and explain the rection.

  • 4)

    An organic compound (A) C6H6O gives violet colour with neutral FeCl3 solution. With NH3 in the presence of anhydrous ZnCI2, (A) gives (B) (C6H7N). (A) with dimethyl sulphate gives (C) (C7H8O). What are (A), (B) and (C)? Explain the reactions.

  • 5)

    An organic compound 'A' is a sodium salt of phenolic acid with molecular formula C7H5O3Na. 'A' on heating with soda lime gives compound 'B' of molecular formula C6H6O. 'B' gives violet colour with neutral ferric chloride. 'B' on treatment with C6H5COCI in the presence of NaOH gives an ester 'C'. Identify 'A', 'B' and 'C'. Explain the reactions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write all possible isomers with molecular formula C4H10O and name them.

  • 2)

    Give short notes on the following: (a) Kolbe's reaction, (b) Riemer - Tiemann reaction

  • 3)

    How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and phenol, (iii) ethyl alcohol and benzyl alcohol?

  • 4)

    What are ethers? Write note on simple and mixed ethers with examples.

  • 5)

    Compound (A) with molecular formula C6H6O gives violet colour with neutral ferric chloride. (A) reacting with CCI4 and NaOH gives two isomers (B) and (C). (A) on oxidation with CrO2Cl2 gives (D) of molecular formula C6H4O2. Identity A, B, C and D. Explain the reactions.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Compound (A) with molecular formula C2H4O reduces Tollen's reagent. (A) On treatment with HCN gives compound (B). Compound (B) on hydrolysis with an acid gives compound (C) with molecular formula C3H6O3 which is an optically active compound. Compound (A) on reduction with N2H/C2HsONa gives a hydrocarbon (D) of molecular formula C2H6. Identify (A), (B), (C) and (D) and explain the reactions.

  • 2)

    An organic compound (A) of molecular formula C7H6O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C7H6O2 which gives brisk effervescence with NaHCO3 solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

  • 3)

    Ail organic compound. (A) C7H6O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

  • 4)

    An organic compound Aofmolecular formula C3H6O answers iodoform test. Another organic compound B of molecular formula C7H6O is known as oil of bitter almonds. A reacts with B to form an unsaturated compound C of molecular formula C10H10O. Compound B reacts with malonic acid in the presence of pyridine to form an unsaturated acid D of molecular formula C9H5O2 Identify A, B, C and D. Explain the reactions.

  • 5)

    Compound (A) with Molecular formula C7H6O does not reduce Fehling's solution. Compound (A) reacts with acetone in the presence of NaOH to give a compound (B) which is an α, β-unsaturated compound. Further (A) reacts with dimethyl aniline in the presence of cone, H2SO4 to give compound (C) which is a dye. Identify (A) (B) and (C). Explain the reactions.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    An organic compound (A) C2H3OCI on treatment with Pd and BaSO4 gives (B) C2H4O which answers iodoform test. (B) when treated with cone.H2SO4 undergoes polymerisation to give (C) a cyclic compound. Identify (A), (B) and (C) and explain the reactions.

  • 2)

    An organic compound (A) with molecular formula C3H6O undergoes iodoform reaction. Two molecules of compound (A) react with dry HCI to give compound (B) (C6H10O). Compound (B) reacts with one more molecule of compound (A) to give compound (C) (C9H14O). Identify (A), (B) and (C). Explain the reactions.

  • 3)

    An organic compound A (C2H3N) on reduction with SnCI2/HCI gives B (C2H4O) which reduces Tollen's reagent. Compound B on reduction with N2H4/C2H5ONa gives C (C2H6). Identify the compounds A, B and C. Explain the reactions involved.

  • 4)

    An organic compound (A) of molecular formula C7H6O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C7H6O2 which gives brisk effervescence with NaHCO3 solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

  • 5)

    Ail organic compound. (A) C7H6O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Account for the following:
    i) (CH3)2 NH is stronger base than NH3
    ii) CH3CH2NH2 is more basic than CH3CONH2
    iii) Aniline is less basic than Ethyl amine
    iv) On sulphonation of aniline, p-amino benzene sulphonic acid is formed.

  • 2)

    Account for
    i) Reduction of CH3CH gives CH3CH2NHwhile CH3NC gives (CH3)2NH.
    ii) (CH3)2NH requires two molar proportion of CH3I to give the same crystalline product formed by (CH3)2N with one mole of CH3l.
    iii) Nitration of aniline with conc.HNO3 may end up with same meta nitro product.
    iv) p-toluidine is a stronger base than p-nitroaniline.

  • 3)

    How can the following coversion be effected?
    i) Nitrobenzene ⇾ Nitrosobenzene
    ii) Nitrobenzene ⇾ Azoxybenzene
    iii) Nitrobenzene ⇾ Hydrazobenzene

  • 4)

    How do primary, secondary and tertiary amines react with nitrous acid?

  • 5)

    Outline the mechanism of
    (a) Nitration of aniline,
    (b) Acetylation of aniline.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What happens when ethylamine is treated with
    (i) CHCl3/NaOH
    (ii) CS2
    (iii) C6H5CHO.

  • 2)

    Account for the following:
    (i) Nitroethane is soluble NaOH
    (ii) Nitroethane reacts with nitrous acid
    (iii) 2-methyl-2-nitro propane has neither of the properties.

  • 3)

    Write the differences between nitro methane and nitro benzene.

  • 4)

    Write a note on
    (i) Carbylamine reaction
    (ii) Mustard oil reaction
    (iii) Acetylation of benzylamine
    (iv) Formation of Schiff's base
    (v) Diazotisation reaction

  • 5)

    CuSO4 on mixing with NH3 (1:4 ratio) does not give test for Cu2+ ions but gives test for SO42- ions. Why?

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Elucidate the structure of glucose.

  • 2)

    Define the following terms as related to proteins
    (i) Primary structure
    (ii) Secondary structure
    (iii) β strands

  • 3)

    List the importance of proteins in biological processes.

  • 4)

    Explain the classification of hormones.

  • 5)

    Distinguish glucose from fructose.

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give the uses of carbohydrates.

  • 2)

    Elucidate the structure of fructose.

  • 3)

    List the importance of proteins in biological processes.

  • 4)

    Outline the classification of carbohydrates giving example for each.

  • 5)

    Show the formation of a peptide bond with an equation.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write a note on drug target interaction.

  • 2)

    Explain Receptor as drug targets.

  • 3)

    Explain the classification of polymers based on their structure and mode of synthesis.

  • 4)

    Styrene polymerises to polystyrene when heated in the presence of peroxide initiator.
    (i) What is the mechanism involved?
    (ii) Give the initiation step for the above process.
    (iii) How does the chain propogate in the above mechanism?
    (iv) How is the above chain reaction terminated?

  • 5)

    Explain the prepareation of Bakelite and Give its use.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give the structure of melamine formaldehyde resin.

  • 2)

    How is Nylon - 6,6 prepared? Give it use.

  • 3)

    Write the preparation of neoprene and give its use.

  • 4)

    Identify the polymer and write the reaction involved.
    (i) Buta-1,3-diene and styrene in the presence of sodium.
    (ii) 3 - hydroxy butanoic acid and 3-hydroxy pentanoic acid.

  • 5)

    Identify the monomers of the following polymers.

    (ii) (NH(CH2)6 NHCO (CH2)4 CO)n
    (iii) \({ CH }_{ 2 }-\underset { \overset { | }{ Cl } }{ C } =CH-{ CH }_{ 2 })_{ n }\)

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How is Low density polyethene prepared?

  • 2)

    The monomer is capro lactam   Identify the polymer when the monomer is heated at 533K.

  • 3)

    Give the condensation reaction between urea and formaldehyde. Identify the polymer.

  • 4)

    How is Buna - N prepared? Give its use.

  • 5)

    Give examples for
    (i) addition polymer,
    (ii) Synthetic rubbers,
    (iii) Condensation polymers,
    (iv) formaldehyde resins.

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Amino acids are amphoteric in nature. Explain.

  • 2)

    How do enzymes help a substrate to be attacked by the reagent effectively?

  • 3)

    Give the structure of sucrose.

  • 4)

    Write the monomers of the following sugars and explain how they are linked.
    (i) Sucrose
    (ii) Maltose
    (iii) Lactose

  • 5)

    Name the two components starch is made up of. How do they differ from each other.

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Draw the structure of α -D fructose furanose and β - D fructose furanose.

  • 2)

    Why sucrose is called invert sugar?

  • 3)

    ExpIain the classification of proteins based on their structure.

  • 4)

    What are carbohydrates? Give two examples.

  • 5)

    Write a note on tertiary structure of proteins.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    An Organic compound (A) with molecular formula C6H7N gives (B) with HNO2 / HCI at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with netural FeCI3. Identify the compounds (A), (B) and (C) and write the equations.

  • 2)

    Outline the preparation of (a) para nitroaniline from aniline, (b) tri bromo benzene from tribromo aniline

  • 3)

    Aniline reacts with Br2/H2O to give a tribromo derivative. How would you convert aniline to get a monobromo derivate?

  • 4)

    Convert aniline to p-nitro aniline

  • 5)

    Starting from the following reagents, how will your prepare ethanenitrile.
    i) CH3Br
    ii) CH3CONH2
    iii) CH3CH=NOH

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain Levine and hauser acetylation.

  • 2)

    How can the following conversion be effected?
    i) Nitrobenzene to anisole
    ii) Chloro benzene to phenyl hydrazine
    iii)  Aniline to benzoic acid
    iv) Benzene diazonium chloride to ehtyl benzene.

  • 3)

    How are the following compounds obtained from benzene diazonium chloride?
    (i) phenol
    (ii) ester
    (iii) p-hydroxy azo benzene

  • 4)

    Write a note on structure of amine.

  • 5)

    An organic compound 'A' on reduction gives compound 'B' which on reaction with trichloromethane and caustic potash forms 'C'. Compound 'C' on catalytic reduction given N-methyl benzenamine. Identify A, B and C and write the reactions involved.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How will you convert benzaldehyde to
    (I) C6H5COOH
    (ii) C6HsCH2OH
    (iii) C6HSCH3

  • 2)

    What is Malachite green dye? Explain its preparation?

  • 3)

    Formic acid reduces Tollen's reagent but acetic acid does not - Give reasons.

  • 4)

    Write the structure of 'A' and 'B' in the following reaction
    \({ C }_{ 6 }{ H }_{ 5 }MgBr+{ CO }_{ 2 }\overset { (i)CO_{ 2 } }{ \underset { (ii){ H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow } } A\overset { { Br }_{ 2 } }{ \underset { FeBr_{ 3 } }{ \longrightarrow } } B\)

  • 5)

    Give the IUPAC names for the following:
    (i) Crotonaldehyde
    (ii) Methyl n-propyl ketone
    (iii) Phenyl acetaldehyde.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain Stephen's reaction.

  • 2)

    Formaldehyde and benzaldehyde give Cannizaro reaction but acetaldehyde does not - account for this.

  • 3)

    How is carboxylic acid prepared from alcohols?

  • 4)

    Write a note on
    (i) Perkin's reaction, and
    (ii) Knoevenagal reaction.

  • 5)

    What happens when the following compounds are treated with dilute NaOH solution in cold?
    (i) propanal
    (ii) (CH3)3C-CHO

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How will you prepare phenol (i) From chloro benzene (ii) From benzene sulphonic acid?

  • 2)

    How is nitroglycerine prepared from glycerol?

  • 3)

    How do ethers react with HI? Give the significances of the reaction.

  • 4)

    Account for the following:
    (I) Phenol does not get protonated readily.
    (ii) Phenol, benzene diazonium chloride, NaOH solution gives red dye.

  • 5)

    Halo alkane are easily prepared from alcohols while alkyl halides cannot be prepared from phenol. Justify.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Why is that tertiary alcohols show greater reactivity towards hydrogen halides than secondary and primary alcohols?

  • 2)

    How is glycerol obtained commercially? State its uses.

  • 3)

    Give a brief account of the following reaction: Etherification.

  • 4)

    Identify the isomerism in each of the following pairs.
    CH3OCH2OCH3 and CH3OCH2CH2OH
    CH3CH(OH)CH2OH and CH2OHCH2CH2OH
    \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-OH\) and CH3-CH2-CH2-CH2OH

  • 5)

    Give the IUPAC names of each of the following and classify them as 1°, 2° and 3°
    (a) CH3(CH2)3CHOHCH(CH3)2
    (b) (CH3)3C-CH2OH
    (c) \(({ CH }_{ 3 })_{ 2 }\underset { \overset { | }{ { C }_{ 6 }{ H }_{ 5 } } }{ C } -OH\)
    (d) \(BrCH_{ 2 }-\underset { \overset { | }{ OH } }{ { CH }_{ 2 } } -CH-C({ CH }_{ 3 })_{ 3 }\)
    (e) CH2=CH-CHOHCH
    (f) PhCH2OH
    (g) HOCH2CH2CH2CH2C6H5
    (h) (C2H5)3COH

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Define Gold number.

  • 2)

    Name various techniques by which a colloid can be deemulsified.

  • 3)

    Name two industrial process where heterogeneous catalysts are used.

  • 4)

    Define adsorption.

  • 5)

    For the coagulation of 100 ml of arsenious sulphide sol, 5 ml of 1 M NaCI is required. What is the flocculation value of NaCl?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write a note on auto catalysis?

  • 2)

    What are the important concepts of catalysis that adsorption theory explains?

  • 3)

    Give an example for a reaction catalysed by nano particles

  • 4)

    How are colloidal solution of ink and graphite prepared?

  • 5)

    What are the advantages of Brownian movement?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The standard reduction potential of Fe3+, Fe2+ / Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?

  • 2)

    Write the overall redox reaction for the zinc-copper cell. Show the oxidation and reduction half reaction.

  • 3)

    Show that SHE can act both as a anode as well as cathode.

  • 4)

    Derive the relation between EMF and free energy.

  • 5)

    Draw a neat diagram of Leclanche cell and mark the parts.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Why does the emf of Leclanche cell decrease?

  • 2)

    Explain the reactions taking place in the anode and cathode of a lead storage battery.

  • 3)

    Corrosion of aluminum takes place at a much slower rate than iron. Give reason

  • 4)

    State Ohms law.

  • 5)

    The standard reduction potential of Fe3+, Fe2+ / Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The activation energy of the reaction 2HI(g) ⟶ H2(g) +I2(g) is 209.5 KJ mol-1 at 581 K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy.

  • 2)

    The decomposition of NH3 on platinum surface is zero order reaction what are the rates of production of N2 and H2 if k = 2.5 x10-4 mol + L S-1.

  • 3)

    What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

  • 4)

    Calculate the half-life of a first order reaction from their rate constants given below.
    (i) 200 S-1
    (ii) 2 min-1
    (iii) 4 years-1

  • 5)

    Write the differences between rate and rate constant of a reaction.

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Silver crystallines in fcc lattice. If edge length of the cell is 4.07 x 10-8 em and density is 10.5 g cm-3. Calculate the atomic mass of silver

  • 2)

    Why are solids incompressible?

  • 3)

    What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3rd of tetrahedral voids?

  • 4)

    Inspite of long range order in the arrangement of particles, why are the crystals usually not perfect?

  • 5)

    ZnO turns yellow on heating. Why?

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write a note on the assignment of atoms per unit cell in fcc.

  • 2)

    State Bragg's law.

  • 3)

    Write the properties of ionic crystals.

  • 4)

    Answer the following:
    (I) Name the intermolecular force present in ice.
    (II) What type of bond is present in network solid?

  • 5)

    Distinguish the following.Crystal lattice and unit cell.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Draw the structures of geometrical isomers of [Fe(NH3)2 (CN)4]-

  • 2)

    What are the limitations of VBT?

  • 3)

    What is \(\pi \) back bonding?

  • 4)

    What is the significance of stability constants?

  • 5)

    Draw and explain the structure of Cisplatin.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What do you mean by auto ionisation of water?

  • 2)

    Define buffer Index

  • 3)

    How will you calculate solubility product from molar solubility?

  • 4)

    What is Henderson equation?

  • 5)

    What do you mean by buffer action?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The rate constant k for the first order gas phase decomposition of ethyl iodide, C2H5I ⟶ C2H4 + HI is 1.60 x 10-5 s-1 at 600k and 6.36 x 10-3 s-1 at 700K. Calculate the energy of activation for this reaction.

  • 2)

    From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.
    (i) 3NO(g) ⟶ N2O(g) Rate = K[NO]2
    (ii) H2O2(aq) + 3I-(aq) +2H+ ⟶ 2H2O(l) +I3- Rate = K[H2O2][I-]
    (iii) CH3CHO(g) ⟶ CH4(g) + CO(g) Rate = K[CH3 CHO]3/2
    (iv) C2H5Cl(g) ⟶ C2H2(g) + HCl(g) Rate = K[C2H5Cl]2

  • 3)

    A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is
    (i) doubled (ii) reduced to half

  • 4)

    A reaction is first order in A and second order in B.
    (i) Write the differential rate equation.
    (ii) How is rate affected on increasing the concentration of B three times?
    (iii) How is the rate affected when the concentrations of both A and B are doubled?

  • 5)

    The rate constant for a first order reaction is 60 S-1. How much time will it take to reduce the initial concentration of the reactant to its \({ \frac { 1 }{ 16 } }^{ th }\) value?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain optical isomerism.

  • 2)

    Explain Bonding is metal carbonyls.

  • 3)

    What is stability constant?

  • 4)

    Name some metal complexes, that are present in our biological system and their role in it.

  • 5)

    Mohr's salt answers the presence of Fe2+, NH4+and SO42- ions, whereas the potassium ferrithiocyanate will not answer Fe3+ and SCN ions give reason.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are the uses of potassium dichromate?

  • 2)

    What happens to potassium permanganate on chemical oxidation?

  • 3)

    Explain the oxidising property of KMnO4 in alkaline medium.

  • 4)

    What are the causes of lanthanoids contraction?

  • 5)

    Which is the last element in the series of the actinoids? Write the electronic configuration of this element comment on the possible oxidation state of this element.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write the properties of interstitial compound.

  • 2)

    What is chromyl chloride test? Give equations.

  • 3)

    Explain the preparation of potassium permanganate from pyrolusite.

  • 4)

    Give the ionic reaction of electrolytic of aqueous solution of KMnO4

  • 5)

    Explain the oxidising property of KMnO4 in natural medium. Give the equations.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain the reaction of ammonia with chlorine and chlorides at different conditions.

  • 2)

    Explain the commercial method of preparation of nitric acid.

  • 3)

    Give a test for sulphate?

  • 4)

    An element A occupies group number 17 and period number 2 is the most electronegative element. Element A reacts with another element B) which occupies group number 17 and period number 4 to give a compound Compound C undergoes sp3d2 hybridisation and has octahedral structure. Identify the elements a and B and the compound C. Write the reactions.

  • 5)

    Discuss the anomalous nature of fluorine.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain the characteristic properties of hydrogen halides.

  • 2)

    Write the order of thermal stability of the hydrides of group 16 elements.

  • 3)

    Explain why the stability of oxoacids of chlorine increases in the order given below?
    HCIO < HCIO2 < HCIO3 < HCIO4

  • 4)

    CIF3 molecule has aT-shaped structure and not a trigonal planar one. Why?

  • 5)

    Predict the product
    (i) PCI5+ C2H5OH \(\longrightarrow \)?
    (ii) P4+ SO2Cl2 \(\longrightarrow \) ?
    (iii) POCl3 + H2O \(\longrightarrow \) ?
    (iv) HBr + PH3\(\longrightarrow \) ? :,
    (v) PCl3+ H2O\(\longrightarrow \) ?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are the uses of boric acid?

  • 2)

    How is boron trifluoride obtained from boron trioxide?

  • 3)

    How is aluminum chloride prepared from aluminum?

  • 4)

    Give 3 uses of aluminium chloride

  • 5)

    Describe the structure of diamond.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How is aluminium chloride prepared by McAfee process?

  • 2)

    Describe the structure of graphite.

  • 3)

    Describe the structure of fullerenes.

  • 4)

    Describe the structure of graphene.

  • 5)

    How is CO2 manufactured?

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What is cyanide leaching? Give an example

  • 2)

    What is meant by ammonia leaching?

  • 3)

    How is acid leaching done for the sulphide ores?

  • 4)

    Explain roasting with an example.

  • 5)

    What is vapour phase method?

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is coupling of reaction? How is it useful in metallurgy?

  • 2)

    How oxides of metals are reduced by hydrogen?

  • 3)

    What is auto-reduction?

  • 4)

    Mention the uses of copper.

  • 5)

    What is Misawite? Give its composition.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Write a note on General anaesthetics?

  • 2)

    What are Antacids? Give three examples of antacid.

  • 3)

    What are food additives?

  • 4)

    What are sugar substituents? Give two examples.

  • 5)

    Define TFM.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write a note on Orion?

  • 2)

    Give an example of bacteriocidal antobiotic.

  • 3)

    Name two narcotic which are used as analgesics.

  • 4)

    Saccharin is 550 times sweeter than sugar, yet used to prepare sweets for diabetic patient - Give reason.

  • 5)

    Why Iodoform and phenolic solutions are called antiseptic?

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Name the two constituent of starch.

  • 2)

    What is renaturation?

  • 3)

    What do you mean by transcription?

  • 4)

    Give an example of an amino acid containing sulphur. Write its zwitter ion form.

  • 5)

    The sucrose that we eat in daily life is converted into glucose and fructose. Name the enzyme which facilitates this chemical reaction.

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Define nucleotide.

  • 2)

    The two strands in DNA are not identical but are complementary explain.

  • 3)

    Write a note on rRNA.

  • 4)

    Name the important biological functions of nucleic acids.

  • 5)

    What do you mean by zwitter ion?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Convertmethylisocyanide ⟶ dimethylamine

  • 2)

    What is 'spirit of nitre'? Give its use.

  • 3)

    Write the uses of nitro alkanes.

  • 4)

    Give any two uses of nitrobenzene.

  • 5)

    In the given set of reactions, 2 bromopropane \(\xrightarrow [ \triangle ]{ Alc.AgCN } \ 'X'\underrightarrow { { LiAlH }_{ 4 } } 'Y'\). Identify the product Y and give its IUPAC name.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What happens when acetonitrile is hydrolysed?

  • 2)

    How will you distinguish between ethylamine and diethylamine?

  • 3)

    What happens when aniline is treated with bromine?

  • 4)

    Explain why aniline is less basic than methylamine?

  • 5)

    Explain why amines are more basic than amides.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Name one reagent used to distinguish acetaldehyde and acetone.

  • 2)

    Does formaldehyde undergo aldol condensation? Justify your answer.

  • 3)

    What is urotropine? Give its use.

  • 4)

    What is formalin? Write its use.

  • 5)

    Write a note on haloform reaction.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is DIBAL -H? What is it used for?

  • 2)

    Write a note on Etard reaction?

  • 3)

    Write the structural formula of 1,1 - dimethoxy ethane. How is it prepared from ethanal?

  • 4)

    Acetone is soluble in water but benzophenone is not. Give reason.

  • 5)

    Write the structures of A and B in the following reaction. Name the reaction involved.
    \({ CH }_{ 3 }COCl\overset { pd/Ba{ SO }_{ 4 } }{ \underset { { H }_{ 2 } }{ \longrightarrow } } A\overset { { NH }_{ 2 }OH }{ \longrightarrow } B\)

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How will you convert C2H5OH to C2H5OC2H5?

  • 2)

    Explain 'esterification' reaction with an example.

  • 3)

    What happens when ethylene reacts with alkaline KMnO4 solution?

  • 4)

    Explain why phenol does not undergo substitution of the -OH group like alcohol.

  • 5)

    Give chemical test to distinguish between methanol and phenol.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What happens when anisole is nitrated?

  • 2)

    Give a test to identify whether a given -OH group is alcoholic or phenolic in nature.

  • 3)

    What happens when crotonaldehyde is reduced in the presence of LiAlH4?

  • 4)

    State Saytzeff's rule.

  • 5)

    Preparation of ethers by intermolecular dehydration of alcohols in the presence of an add is not a suitable method for mixed ethers. Give reason.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What is peptisation? Give an example.

  • 2)

    Explain the formation of delta.

  • 3)

    Why is a colloidal sol stable?

  • 4)

    Which will adsorb more gas, a lump of charcoal or its powder and why?

  • 5)

    Name the types of emulsions.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is ultrasonic dispersion?

  • 2)

    Why are colloids purified?

  • 3)

    Give the methods of purification of colloids.

  • 4)

    What is Ultrafilteration?

  • 5)

    What is Helmholtz double layer?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give an example of secondary cell.

  • 2)

    Write the oxidation, reduction and overall redox reaction taking place in the Lithium ion battery.

  • 3)

    What is a fuel cell?

  • 4)

    Explain how iron is protected from corrosion by coating with magnesium.

  • 5)

    What is passivation?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give examples of primary cells.

  • 2)

    Name the anode, cathode and electrolyte used in lithium - ion Battery

  • 3)

    What is known as intercalation?

  • 4)

    Write a note on galvanising

  • 5)

    What is corrosion?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give a condition for a compound to be precipitated.

  • 2)

    Magnesium is not precipitated from a solution of its salt by a mixture of NH4OH and NH4Cl. Explain

  • 3)

    BF3 is termed as an acid though it does not contain H+ ions. Explain.

  • 4)

    Calculate the ionisation constant for the conjugate base of HF. Ionisation constant of HF at 298 K is 6.8 x 10-4

  • 5)

    Why is aqueous solution of FeCl3 acidic?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Define neutralisation reaction.

  • 2)

    When temperature is increased, will ionic product of water increase or decrease? Give reason to justify your answer.

  • 3)

    The KW of a neutral solution is 10-12 at a particular temperature. What are its pH and pOH values?

  • 4)

    How is common ion effect related to the solubility of the electrolyte?

  • 5)

    What are the limitations of Ostwald's dilution law?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 x 10-4mol L-1. What is the order of the reaction.

  • 2)

    For the reaction Cl2 (g) + 2NO (g) ⟶ 2NOCI(g)
    The rate law is expressed as rate = K[Cl2] [NO]2
    What is the overall order of this reaction?

  • 3)

    Write the units of zeroth, first, second and third order rate constants.

  • 4)

    If the rate of a reaction gets doubled as the temperature is increased from 27oC to 37oC. Find the activation energy of reaction?

  • 5)

    Mention the factors that affected the rate of a chemical reaction.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How does the value of rate constant vary with reactant constant.

  • 2)

    Answer the following:
    (i) Effect the adding catalyst on activation energy and Gibb's energy (ΔG).
    (ii) Why do we heat the solution of oxalic acid in redox tetration against KMnO4?

  • 3)

    A first order reaction has a specific reaction rate of 10-3 S-1. How much time will it take for 10gm of the reactant to reduce to 2.5 gm?

  • 4)

    In a reaction, 2A \(\longrightarrow \) products, the concentration of A decreases from 0.5 mol L-1 to 0.4 mol L-1 in 10 minutes. Calculate the rate during this interval?

  • 5)

    Explain how will you find activation energy of a reaction by graphical method.

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Name the seven primitive crystal systems.

  • 2)

    In CaF2 crystal, Ca2+ ions are present in arrangement. Calculate the number of F- ions in the unit cell.

  • 3)

    Distinguish between cubic and hexagonal unit cells.

  • 4)

    What is F centre?

  • 5)

    A compound forms hexagonal dosed packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?

  • 2)

    Which point effect in crystal doesn't alter the density of the relevant solid?

  • 3)

    Define void.

  • 4)

    Diamond and solid rhombic sulphur are covalent solids but the latter has very low melting point than the former. Explain why?

  • 5)

    Define the term: space lattice.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Identify the ligand and the central metal in the Co-ordination compound. [Co(NH3)4Cl6]CI

  • 2)

    What are Co-ordination isomers? Give examples

  • 3)

    What are stereoisomers?

  • 4)

    What is facial isomer?

  • 5)

    Give the two isomers of Co2(CO)8.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is the coordination number of central metal ion in [Fe(C2O4)3]3-?

  • 2)

    Write the IUPAC name of the complex.

  • 3)

    Define 'Ligand' Give an example of nautral legand.

  • 4)

    Write the IUPAC name of [Ag(NH3)2]Cl.

  • 5)

    Give the chemical formula of potassium trioxalato ferrate(III}

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What is hydroformylation of olefins?

  • 2)

    What is Zeigler - Natta catalyst?

  • 3)

    What are the conditions for alloy formation?

  • 4)

    Draw the structure of permanganate ion.

  • 5)

    What is Bayer's reagent?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Why Zn2+ salts are white while Ni2+ salts are coloured?

  • 2)

    Silver atom has completely filled d-orbitals (4d10) in its ground state. How can you say that it is a transition element?

  • 3)

    What happens when KMnO4 is treated with KI?

  • 4)

    Orange colour of Cr2O72- ion charges to yellow in alkali and yellow solution turns out orange on adding H+ ions. Explain why?

  • 5)

    Many industrial processes use transition metal or their compounds as catalyst. Why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How is SO2 an air pollutant?

  • 2)

    Give the reason for bleaching action of Cl2.

  • 3)

    Arrange the following as indicated below:
    (i) F2, Cl2, Br2, I2 - increasing bond dissociation enthalpy.
    (ii) HF, HCI, HBr, HI - increasing acidic strength.

  • 4)

    Explain Why inspite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not - Give reason.

  • 5)

    (i) Nitric oxide becomes brown when released in air. Why?
    (ii) BiCl3 is more stable than BiCl3, Why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give two uses of nitric acid.

  • 2)

    What is the reaction of Phosphorous with alkali?

  • 3)

    Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?

  • 4)

    (i) Give correct order of boiling point of hydride of group 17.
    (ii) Fluorine exhibits only -1 oxidation state whereas other halogens show +1, +3, +5 and +7 oxidation state also Explain.

  • 5)

    There is a huge difference between the melting and boiling points of oxygen and sulphur. Why?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are the uses of silicon tetra chloride?

  • 2)

    What is inert pair effect?

  • 3)

    Name the building block of zeolites. Why zeolites have high porosity?

  • 4)

    Name the two important ores of Boron.

  • 5)

    Which one is more soluble in diethyl ether, anhydrous Alcl3 or hydrated Alcl3? Explain in terms of bonding.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain the formation of boron trifluoride.

  • 2)

    Mention the physical properties of boranes.

  • 3)

    What are the uses of boron trifluoride?

  • 4)

    What is burnt alum?

  • 5)

    What is phosgene? How is it prepared?

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What is the role of graphite rods in the electro metallurgy of aluminium?

  • 2)

    Name and discuss the principle involved in obtaining silicon of high purity.

  • 3)

    Give reason : Extraction of copper directly from sulphide ores is less favourable than from its oxide ores through reduction.

  • 4)

    Define metallurgy.

  • 5)

    Define roasting.

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Name some common methods of ore concentration.

  • 2)

    Name some reducing agents used to convert Metal oxides to metal

  • 3)

    Name the various refining process.

  • 4)

    Why are sulphide ores converted to oxide form before reduction to metal?

  • 5)

    Write the two similarities between calcination and roasting.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Zeiglar Natta catalyst is _________

  • 2)

    Addition polymerisation is also called as _______ polymerisation.

  • 3)

    The polymer obtained by the condensation of phenol with formaldehyde is ________

  • 4)

    The specific treatment of a disease using medicine is known as ________

  • 5)

    Proteins which act as biological catalysts are called ________

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Sulphur dioxide act as _________

  • 2)

    The monomer of PVC is _______

  • 3)

    Which of the following is not a non - narcotic analgesic?

  • 4)

    Zeiglar Natta catalyst is _________

  • 5)

    Addition polymerisation is also called as _______ polymerisation.

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The sugar unit present in nucleic acid is___________

  • 2)

    Penta hydroxy hexanone is__________

  • 3)

    In acidic solution an amino acid, when placed in an electric field__________

  • 4)

    The precipitation of protein is called_________

  • 5)

    Hydrolysis of cellulose yields_______

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Which is a monosaccharide among the following?

  • 2)

    Sucrose is not

  • 3)

    Glucose is not oxidised to gluconic acid by

  • 4)

    The amino acid without chiral carbon is

  • 5)

    Which is not true of amino acid?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The compound that does not show tautomerism is ____________

  • 2)

    CCl3 NO2 is used as ________

  • 3)

    Use of chloropicrin is as ____________

  • 4)

    Oxidation of aniline with acidified K2Cr2O7 gives ___________

  • 5)

    The intermediate formed in the nitration of benzene is _________

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    C6H5NH\(\underrightarrow { { NANO }_{ 2 }/HCl } \)  X Identify X.

  • 2)

    Aniline differs from ethylamine by the reaction with

  • 3)

    Which among the following dissolves in NaOH?

  • 4)

    When nitro methane condenses with acetone it gives

  • 5)

    Which gives an yellow oil with nitrous acid?

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    With respect to the reagents given below, pick out the odd one _________.

  • 2)

    Formic acid contains _______ groups

  • 3)

    acid chloride + alcohol \(\longrightarrow\)?.

  • 4)

    CH3CHO and C6H5CH2CHO can be distinguished by ______.

  • 5)

    \(Phenol\overset { Zn }{ \underset { dust }{ \longrightarrow } } 'X'\overset { { CH }_{ 3 }Cl }{ \underset { anhy\ AlC{ I }_{ 3 } }{ \longrightarrow } } Y\overset { alk }{ \underset { { KMnO }_{ 4 } }{ \longrightarrow Z } } \) the product Z is __________.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Cannizaro reaction is not given by _______.

  • 2)

    The IUPAC name of the compound

  • 3)

    Identify 'X'.

  • 4)


    Choose a suitable reagent to carry out the above reaction.

  • 5)

    A compound 'X' when mixed with ethanol and a drop of concentrated H2SO4 gave a compound with fruity odour. Identify 'X'.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The number of possible isomers for molecular formula C4H10O is _________.

  • 2)

    The number of alcohol isomers for molecular formula C4H10O is ________.

  • 3)

    CH3-CH2-O-CH2CH3 and \({ CH }_{ 3 }-O-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 3 }\) are examples of _______ isomerism.

  • 4)

    _______ cannot be prepared by using Grignard reagent.

  • 5)

    On heating, peroxides are ________.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Which of the following has an offensive odour?

  • 2)

    Which of the following is not correct? Glycerol is used as ______.

  • 3)

    Which one of the following is optically active?

  • 4)

    The compound that does not undergo Cannizaro reaction is ______.

  • 5)

    Which one of the following is simple ether?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Decomposition of hydrogen peroxide is retarded in the presence of________.

  • 2)

    The emulsifying agent used in O/W type is _______.

  • 3)

    Emulsifying agent is used for________.

  • 4)

    The colloid used for stomach disorder is_______.

  • 5)

    Argyrol is_______.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The phenomenon of Tyndall's effect is not observed in _______.

  • 2)

    Colloidal medicines are more efffective because _______.

  • 3)

    Oil soluble dye is mixed with emulsion and emulsion remains colourless then, the emulsion is _______.

  • 4)

    For chemisorption, which is wrong?

  • 5)

    Colloids are purified by _______.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The electrode where there is gain of electrons is called ______.

  • 2)

    The zinc - copper cell has emf of _______.

  • 3)

    For gases, the standard emf depends on _______.

  • 4)

    SHE is _______.

  • 5)

    The feasibility of a redox reaction can be predicted with the help of ________.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid ______.

  • 2)

    NH4OH is a weak base because ______.

  • 3)

    An example for 1 : 1 electrolyte is ______.

  • 4)

    According to Faraday's first law m = ZIt, where Z is ______.

  • 5)

    1 mho is equal to ______.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    \({ X }_{ m }{ Y }_{ n(s) }\overset { { H }_{ 2 }O }{ \rightleftharpoons } { mX }_{ (aq) }^{ n+ }+{ nY }_{ (aq) }^{ m- }\)

  • 2)

     Which among the following is incorrect regarding acids?

  • 3)

    When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid _______.

  • 4)

    Which one of the following formula represents Ostwald's dilution law for a binary whose degree of dissociation is a and concentration C.

  • 5)

    Which one of the following relationship is correct?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Pick out the incorrect statement regarding Lewis acids and bases

  • 2)

    With regard to the strength of acids and bases, Find the incorrect statement among the following.

  • 3)

    HCl is a strong acid since _______.

  • 4)

    Ionic product of water increases when _______.

  • 5)

    An aqueous solution with pH value zero is _______.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    CH3COOCH3 + H2\(\overset { { H }^{ + } }{ \longrightarrow } \) CH3COOH + CH3OH is an example of _______ order reaction.

  • 2)

    For a general reaction aA + bB ⟶Products, the rate of the reaction is equal to______.

  • 3)

    In a second order reaction, if one of the concentration is excess, the order of the reaction is ________ order reaction.

  • 4)

    If [A] is the concentration of A at any time t and [Ao] is the concentration at t = 0, then for the first order reaction, the rate equation can be written as ______.

  • 5)

    Activation energy of a reactant is reduced by ________.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The Unit of rate constant and rate of reaction are same for ______.

  • 2)

    Which of the following statement is not correct?

  • 3)

    For an exothermic chemical process occurring in 2 steps as
    (i) A +B ⟶ X (slow) ;
    (ii) X ⟶  AB (fast)
    The progress of the reaction can be best described by (x- intermediate).

  • 4)

    Nitric oxide (NO) reacts wtih oxygen to produce nitrogen dioxide
    2NO(g) + O2(g) ⟶ 2NO2(g)
    If the mechanism of reaction is ______.
    NO + O2 \(\overset { K }{ \rightleftharpoons } \) NO3 (fast)
    NO3 + NO \(\overset { { K }_{ 1 } }{ \rightleftharpoons } \) NO2 + NO2 (slow)

  • 5)

    A reaction having equal activation energies for forward and reverse reactions has ______.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    If electrical conductivity is found to be same in all directions through a solid the substance is ________ solid and the property is called _________.

  • 2)

    Coordination number of tetrahedral and octahedral voids respectively are________.

  • 3)

    Crystals of NaCI has yellow colour due the presence of_________.

  • 4)

    Structure of B2O3 is _____.

  • 5)

    The correct order of packing efficiency in different types of unit cells is________.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

  • 2)

    What is wrong about a.b.c.c. unit cell?

  • 3)

    Which one of the following does not belong to AB type?

  • 4)

    The smallest repeating unit in space lattice which when repeated over and again results in the crystal of the given substance is called_______.

  • 5)

    The number of close neighbours in a body centred cubic lattice of identifical spheres is _______.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    _______ valencies are directional in nature.

  • 2)

    The number of trans positions in a octahedral complex is _________.

  • 3)

    The chemical formula for diammine silver (I) chloride is _______.

  • 4)

    Magnetic moment is given by the formula _______.

  • 5)

    The oxidation state of the central metal ion in the complex [Co(H2O)(CN)(en)2]2+ is________.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Primary and secondary valencies of Cu in [Cu(NH3)4]SO4 is _______.

  • 2)

    Which of the following octahedral complexes do not show geometrical isomerism?

  • 3)

    The spin only magnetic moment of [Mnfsr4]2- is 5.9 BM. Geometry of the complex ion is _______.

  • 4)

    According to CFT, five d-orbitals of an octahedral complex split to give _______.

  • 5)

    Which of the following is correct statement?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    ________ has the highest electrical conductivity at room temperature.

  • 2)

    If the standard electrode potential (Eo) of a inetal is ________ and __________ the metal is a powerful reducing agent.

  • 3)

    Equivalent weight of KMnO4 in acidic medium is _______.

  • 4)

    The common oxidation state of lanthanonids is ________.

  • 5)

    _________ is known as Bayer's reagent.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The highest possible oxidation state shown by osmium in its compound is_______.

  • 2)

    The trend in ionisation enthalpy of a transition element is not regular because,_______.

  • 3)

    Which one of the following exhibits highest oxidation state?

  • 4)

    Which of the following is coloured due to charge transfer?

  • 5)

    What are the species X and Y in the following?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The incorrect statement regarding structure of ozone is______.

  • 2)

    Strong reducing behaviour of H3PO2 is due to______.

  • 3)

    Which reaction is not feasible.

  • 4)

    The ionisation energy of Ga is higher than that of Al because of_________

  • 5)

    The high reactivity of fluorine is due to________.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Catenation property of group 15 elements, follow the order _______.

  • 2)

    Which is dibasic?

  • 3)

    Allotrope of sulphur which shows paramagnetic behaviour _______.

  • 4)

    Pick the wrong one among the following

  • 5)

    When Copper is heated with cone HNO3 it produces

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Elements of group 13 mainly form covalent compounds because ______

  • 2)

    All elements except carbon have the tendency to show maximum covalency of six ______

  • 3)

    Group 14 elements have general electronic configuration _______.

  • 4)

    The silicates which contain discrete tetrahedral units are _______.

  • 5)

    Borax is _______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.

  • 2)

    Chemical formula of phosgene is_______.

  • 3)

    SiO44- ion has ____ geometry.

  • 4)

    Which of the following oxide is amphoteric?

  • 5)

    Which of the following statements about H3BO3 is not correct?

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The percentage of carbon in high carbon steel is_________.

  • 2)

    Steel is an alloy of___________

  • 3)

    Sodium cyanide solution is used to extract _________from its ores

  • 4)

    Galena is_______.

  • 5)

    In Hall-Heroult process___________act as an anode.

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Which of the following is not a mineral of aluminium?

  • 2)

    Among the following, one does not belong to calcination, Pick the odd one out.

  • 3)

    Name the process by which elements such as germanium, silicon and galium are refined.

  • 4)

    In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with________.

  • 5)

    Which one of the following element is present as a impurity in pig iron?

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

  • 2)

    How will you convert boric acid to boron nitride?

  • 3)

    Give a reaction between nitric acid and a basic oxide.

  • 4)

    The E0M2+/M value for copper is positive. Suggest a possible reason for this.

  • 5)

    A solution of [Ni(H2O)6]2+ is green, whereas a solution of [Ni(CN)4]2- is colorless -Explain

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain the principle of electrolytic refining with an example.

  • 2)

    Write a note on zeolites.

  • 3)

    Give two equations to illustrate the chemical behaviour of phosphine.

  • 4)

    Which is stronger reducing agent Cr2+ or Fe2+?

  • 5)

    What is crystal field stabilization energy (CFSE)?

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain the following terms with suitable examples.
    (i) Gangue
    (ii) slag

  • 2)

    AlCl3 behaves like a lewis acid. Substantiate this statement.

  • 3)

    How will you prepare chlorine in the laboratory?

  • 4)

    Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

  • 5)

    What is linkage isomerism? Explain with an example.

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain the electrometallurgy of aluminium.

  • 2)

    Describe the structure of diborane.

  • 3)

    Give a reason to support that sulphuric acid is a dehydrating agent.

  • 4)

    Explain the variation in E0M3+/M2+  3d series.

  • 5)

    Classify the following ligands based on the number of donor atoms.
    a) NH3
    b) en
    c) ox2-
    d) pyridine

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are the differences between minerals and ores?

  • 2)

    Write a note on Fisher tropsch synthesis.

  • 3)

    Chalcogens belongs to p-block. Give reason.

  • 4)

    Why Gd3+ is colourles?

  • 5)

    Arrange the following in order of increasing molar conductivity
    (i) Mg[Cr(NH3)(Cl)5]
    (ii) Cr(NH3)5Cl]3[CoF6]2
    (iii) [Cr(NH3)3Cl3]

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is the role of quick lime in the extraction of Iron from its oxide Fe2O3?

  • 2)

    What is catenation ? describe briefly the catenation property of carbon.

  • 3)

    Explain why fluorine always exhibit an oxidation state of -1?

  • 4)

    Justify the position of lanthanoids and actinoids in the periodic table.

  • 5)

    Write the IUPAC names for the following complexes.

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Which of the metal is extracted by Hall-Heroult process?

  • 2)

    Which of the following reduction is not thermodynamically feasible?

  • 3)

    Duralumin is an alloy of ______.

  • 4)

    Which of the following is strongest acid among all?

  • 5)

    The catalytic behaviour of transition metals and their compounds is ascribed mainly due to _______.

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Roasting of sulphide ore gives the gas (A).(A) is a colourless gas. Aqueous solution of (A) is acidic. The gas (A) is______.

  • 2)

    The following set of reactions are used in refining Zirconium 
    \(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
    \({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.

  • 3)

    In diborane, the number of electrons that accounts for banana bonds is ________.

  • 4)

    Which is true regarding nitrogen?

  • 5)

    Which of the following does not give oxygen on heating?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are narcotic and non – narcotic drugs. Give examples

  • 2)

    Write a note on co –polymer

  • 3)

    How is terylene prepared?

  • 4)

    Classify the following as linear, branched or cross linked polymers
    a) Bakelite
    b) Nylon-6,6
    c) polythene (HDPE) 
    d) polythene (LDPE)

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are anti fertility drugs? Give examples.

  • 2)

    What are bio degradable polymers? Give examples.

  • 3)

    Write a note on vulcanization of rubber

  • 4)

    Differentiate thermoplastic and thermosetting.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Define enzymes

  • 2)

    Write the structure of α-D (+) glucophyranose

  • 3)

    What are different types of RNA which are found in cell

  • 4)

    Write a note on formation of α-helix .

  • 5)

    What are the functions of lipids in living organism.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How will you convert diethylamine into
    i) N, N – diethylacetamide
    ii) N – nitrosodiethylamine

  • 2)

    Identify A,B and C
    \(\overset{SOCl_2}\longrightarrow A \overset{NH_3}\longrightarrow B\overset{LiAlH_4}\longrightarrow (C)\)

  • 3)

    Complete the following reaction

  • 4)

    Predict A,B,C and D for the following reaction

  • 5)

    Identify A to E in the following sequence of reactions
       
     \(\overset { {CH_3} {CL} }{ \underset { {AlCl}_3 }{ \longrightarrow } }\) A \(\overset { {HNO_3}/ {H_2So_4} }{ \underset { {} }{ \longrightarrow } }\)  B \(\overset { {Sn} /{HCL} }{ \underset {{} }{ \longrightarrow } }\)  (C) \(\overset { {NaNo_2}/ {HCL} }{ \underset { {O^o}C }{ \longrightarrow } }\)  D \(\overset { {CuCN} }{ \underset { {}}{ \longrightarrow } }\) E

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.

  • 2)

    How are the following conversions effected
    (a) propanal into butanone
    (b) Hex-3-yne into hexan-3-one.
    (c) phenylmethanal into benzoic acid
    (d) phenylmethanal into benzoin

  • 3)

    Complete the following reaction
    \({ CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 }\overset { HO-{ CH }_{ 2 }-{ CH }_{ 2 }-OH }{ \underset { { dry }{ HCl} }{ \longrightarrow } } ?\)

  • 4)

    Identify A, B and C

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How will you convert acetylene into n-butyl alcohol.

  • 2)

    Complete the following reactions

    ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

  • 3)


    Identify A,B,C,D and write the complete equation

  • 4)

    0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm3 of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.

  • 5)

    An organic compound (A) of molecular formula C6H6O gives violet colour with neutral FeCI3. (A) gives maximum of two isomers (B) and (C) when an alkaline solution of (A) is refluxed with CCI4 (A) also reacts with C6H5N2CI to give the compound (D) which is red orange dye. Identify (A), (B), (C) and (D). Explain with suitable chemical reactions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What will be the product (X and A) for the following reaction acetylchloride \(\frac{\text { i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { ii) } \mathrm{H}_{3} \mathrm{O}^{+}}{\longrightarrow} \mathrm{X} \stackrel{\text { acid } \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\longrightarrow}\) 

  • 2)

    Predict the product A,B,X and Y in the following sequence of reaction

  • 3)

    Phenol is distilled with Zn dust followed by friedel – crafts alkylation with prophyl chloride to give a compound B, B on oxidation gives (c) Indentify A,B and C.

  • 4)

    Complete the following reactions 
    i) CH3- CH2 - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\)  A  \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
    ii) C6H5- OH  \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C

  • 5)

    An organic compound (A) molecular formula CH2O reacts with CH3MgI to give compound (B). Compound (B) liberates Hydrogen with metallic sodium. Compound (B) in the presence of Con. H2SO4 at 410 K on dehydration to give compound (C) molecular formula C4H10O. Identify (A), (B) and (C). Explain the above reactions.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Why does bleeding stop by rubbing moist alum

  • 2)

    Comment on the statement: Colloid is not a substance but it is a state of substance.

  • 3)

    Write a note on electro osmosis.

  • 4)

    Explain intermediate compound formation theory of catalysis with an example.

  • 5)

    Describe adsorption theory of catalysis

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    In fuel cell Hand O2 react to produce electricity. In the process, H2 gas is oxidised at the anode and O2 at cathode. If 44.8 litre of H2 at 250C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu2+, how many grams of Cu deposited?

  • 2)

    A copper electrode is dipped in 0.1M copper sulphate solution at 25oC. Calculate the electrode potential of copper. [Given: E0Cu2+|Cu = 0.34V].

  • 3)

    9.2\(\times\)1012 litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)106 Cs−1 at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.

  • 4)

    Write a note on sacrificial protection.

  • 5)

    Ionic conductance at infinite dilution of Al3+ and SO4 2- are 189 and 160 mho cm2 equiv-1. Calculate the equivalent and molar conductance of the electrolyte Al2(SO4)3 at infinite dilution.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    In fuel cell Hand O2 react to produce electricity. In the process, H2 gas is oxidised at the anode and O2 at cathode. If 44.8 litre of H2 at 250C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu2+, how many grams of Cu deposited?

  • 2)

    A copper electrode is dipped in 0.1M copper sulphate solution at 25oC. Calculate the electrode potential of copper. [Given: E0Cu2+|Cu = 0.34V].

  • 3)

    9.2\(\times\)1012 litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)106 Cs−1 at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.

  • 4)

    Write a note on sacrificial protection.

  • 5)

    Ionic conductance at infinite dilution of Al3+ and SO4 2- are 189 and 160 mho cm2 equiv-1. Calculate the equivalent and molar conductance of the electrolyte Al2(SO4)3 at infinite dilution.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Solubility product of Ag2CrO4 is \(1\times10^{-12}\). What is the solubility of Ag2CrO4 in 0.01M AgNO3 solution?

  • 2)

    A saturated solution, prepared by dissolving CaF2(s) in water, has \([Ca^{2+}]=3.3\times10^{-4}M\). What is the Ksp of CaF2?

  • 3)

    A particular saturated solution of silver chromate Ag2CrO4 has \([Ag^{+}]=5\times10^{-5}\) and \([CrO_{4}]^{2-}=4.4\times10^{-4}M\). What is the value of Ksp for Ag2 CrO4?

  • 4)

    Ksp of Ag2CrO4 is \(1.1\times10^{-12}\). What is solubility of Ag2CrO4 in 0.1M K2CrO4.

  • 5)

    Ksp of Al(OH)3 is 1\(\times\)10-15M. At what pH does 1.0×10-3M Al3+ precipitate on the addition of buffer of NH4Cl and NH4OH solution?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Ksp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO3

  • 2)

    Write the expression for the solubility product of Hg2Cl2 .

  • 3)

    Will a precipitate be formed when 0.150 L of 0.1M Pb(NO3)2 and 0.100L of 0.2 M NaCl are mixed? \(K_{sp}\ (PbCl_{2})=1.2\times10^{-5}\).

  • 4)

    What is the pH of an aqueous solution obtained by mixing 6 gram of acetic acid and 8.2 gram of sodium acetate and making the volume equal to 500 ml. (Given: Ka for acetic acid is  \(1.8\times10^{-5}\))

  • 5)

    Establish a relationship between the solubility product and molar solubility for the following
    a) BaSO
    b) Ag2(CrO4)

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How do concentrations of the reactant influence the rate of reaction?

  • 2)

    The rate constant for a first order reaction is 1.54 x 10-3 s-1. Calculate its half life time.

  • 3)

    The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?

  • 4)

    The activation energy of a reaction is 22.5 k Cal mol-1 and the value of rate constant at 40°C is 1.8 x 10-5s-1. Calculate the frequency factor, A.

  • 5)

    The rate constant of a reaction at 400 and 200K are 0.04 and 0.02 s-1 respectively. Calculate the value of activation energy.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How do nature of the reactant influence rate of reaction.

  • 2)

    The half life of the homogeneous gaseous reaction SO2Cl2 → SO2 + Cl2 which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO2Cl2 to be reduced to 1% of the initial value?

  • 3)

    A zero order reaction is 20% complete in 20 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

  • 4)

    A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

  • 5)

    Rate constant k of a reaction varies with temperature T according to the following Arrhenius equation  \(\log K=\log A-\frac { { E }_{ a } }{ 2.303R } \left( \frac { 1 }{ T } \right) \)Where Ea is the activation energy. When a graph is plotted for log k Vs \(\frac{1}{T}\) a straight line with a slope of -4000K is obtained. Calculate the activation energy.

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    An element has bcc structure with a cell edge of 288 pm. The density of the element is 7.2 g cm-3. How many atoms are present in 208 g of the element.

  • 2)

    If NaCl is doped with 10-2 mol percentage of strontium chloride, what is the concentration of  cation vacancy?

  • 3)

    KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K+ and F in KF. (given : density of KF is 248 g cm-3)

  • 4)

    An atom crystallizes in fcc crystal lattice and has a density of 10 gcm−3 with unit cell edge length of 100pm. Calculate the number of atoms present in 1 g of crystal.

  • 5)

    Sodium metal crystallizes in bcc structure with the edge length of the unit cell 4.3 x 10-8 cm. Calculate the radius of sodium atom.

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What is meant by the term “coordination number”? What is the coordination number of atoms in a bcc structure?

  • 2)

    Aluminium crystallizes in a cubic close packed structure. Its metallic radius is 125pm. calculate the edge length of unit cell.

  • 3)

    KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K+ and F in KF. (given : density of KF is 248 g cm-3)

  • 4)

    Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?

  • 5)

    Write a note on Frenkel defect.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain optical isomerism in coordination compounds with an example.

  • 2)

    What is crystal field splitting energy?

  • 3)

    A solution of [Ni(H2O)6]2+ is green, whereas a solution of [Ni(CN)4]2- is colorless -Explain

  • 4)

    What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?

  • 5)

    What are the limitations of VB theory?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are hydrate isomers? Explain with an example.

  • 2)

    What is crystal field stabilization energy (CFSE)?

  • 3)

    Discuss briefly the nature of bonding in metal carbonyls.

  • 4)

    On the basis of VB theory explain the nature of bonding in [Co(C2O4)3]3-

  • 5)

    Write the oxidation state, coordination number , nature of ligand, magnetic property and electronic configuration in octahedral crystal field for the complex K4[Mn(CN)6]

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Why europium (II) is more stable than Cerium (II)?

  • 2)

    Which is stronger reducing agent Cr2+ or Fe2+?

  • 3)

    Predict which of the following will be coloured in aqueous solution Ti2+, V3+, Sc4+, Cu+, Sc3+, Fe3+, Ni2+ and Co3+

  • 4)

    Which metal in the 3d series exhibits +1 oxidation state most frequently and why?

  • 5)

    Transition metals show high melting points. Why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Out of Lu(OH)3 and La(OH)3 which is more basic and why?

  • 2)

    Why do zirconium and Hafnium exhibit similar properties?

  • 3)

    The E0M2+/M value for copper is positive. Suggest a possible reason for this.

  • 4)

    Describe the variable oxidation state of 3d series elements.

  • 5)

    Why first ionization enthalpy of chromium is lower than that of zinc?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give two equations to illustrate the chemical behaviour of phosphine.

  • 2)

    Give a reaction between nitric acid and a basic oxide.

  • 3)

    Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.

  • 4)

    Deduce the oxidation number of oxygen in hypofluorous acid – HOF.

  • 5)

    Complete the following reactions.
    \(1. \mathrm{NaCl}+\mathrm{MnO}_{2}+\mathrm{4H}_{2} \mathrm{SO}_{4} \longrightarrow \)
    \(2. \mathrm{NaNO}_{2}+\mathrm{HCl} \longrightarrow \)
    \(3.\mathrm{P}_{4}+\mathrm{3NaOH}+\mathrm{3H}_{2} \mathrm{O} \longrightarrow \)
    \(4. \mathrm{AgNO}_{3}+\mathrm{PH}_{3} \longrightarrow \)
    \(5. \mathrm{Mg}+\mathrm{10HNO}_{3} \longrightarrow \)
    \(6. \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} \)
    \(7. \mathrm{Cu}+Con. \ Hot \ \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\)
    \(8. \mathrm{Sb}+\mathrm{Cl}_2 \longrightarrow \)
    \(9. \mathrm{HBr}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \)
    \(10. \mathrm{XeF}_6+\mathrm{H}_2 \mathrm{O} \longrightarrow \)
    \(11. \mathrm{XeO}_6{ }^{4-}+\mathrm{Mn}^{2+}+\mathrm{H}^{+} \longrightarrow \)
    \(12. \mathrm{XeOF}_4+\mathrm{SiO}_2 \longrightarrow \)
    \(13. \mathrm{Xe}+\mathrm{F}_2 \frac{\mathrm{Ni} / 200 \mathrm{~atm}}{400^{\circ} \mathrm{C}}\)
    .

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give two equations to illustrate the chemical behaviour of phosphine.

  • 2)

    What happens when PCl5 is heated?

  • 3)

    Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.

  • 4)

    Deduce the oxidation number of oxygen in hypofluorous acid – HOF.

  • 5)

    What type of hybridisation occur in
    a) BrF5
    b) BrF3

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How will you identify borate radical?

  • 2)

    Write a note on zeolites.

  • 3)

    How will you convert boric acid to boron nitride?

  • 4)

    A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). Identify A, B and C.

  • 5)

    CO is a reducing agent. Justify with an example.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Describe the role of the following in the process mentioned.
    (i) Silica in the extraction of copper.
    (ii) Cryolite in the extraction of aluminium.
    (iii) Iodine in the refining of Zirconium.
    (iv) Sodium cyanide in froth floatation.

  • 2)

    Explain the principle of electrolytic refining with an example.

  • 3)

    The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

  • 4)

    Give the limitations of Ellingham diagram.

  • 5)

    Write a short note on electrochemical principles of metallurgy.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Who do soaps not work in hard water?

  • 2)

    What are drugs? How are they classified.

  • 3)

    How the tranquilizers work in body.

  • 4)

    Write the structural formula of aspirin.

  • 5)

    Explain the mechanism of cleansing action of soaps and detergents.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are drugs? How are they classified.

  • 2)

    How the tranquilizers work in body.

  • 3)

    Write the structural formula of aspirin.

  • 4)

    Explain the mechanism of cleansing action of soaps and detergents.

  • 5)

    Which sweetening agent are used to prepare sweets for a diabetic patient?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Write a note on denaturation of proteins.

  • 2)

    What are reducing and non – reducing sugars?

  • 3)

    Why carbohydrates are generally optically active.

  • 4)

    Classify the following into monosaccharides, oligosaccharides and polysaccharides.
    i) Starch
    ii) fructose
    iii) sucrose
    iv) lactose
    iv) maltose

  • 5)

    How are vitamins classified?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give two difference between Hormones and vitamins.

  • 2)

    Write a note on denaturation of proteins.

  • 3)

    Why carbohydrates are generally optically active.

  • 4)

    How are vitamins classified?

  • 5)

    What are harmones? Give examples

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    How will you distinguish between primary secondary and tertiary alphatic amines.

  • 2)

    Account for the following
    i. Aniline does not undergo Friedel – Crafts reaction
    ii. Diazonium salts of aromatic amines are more stable than those of aliphatic amines
    iii. pKb of aniline is more than that of methylamine
    iv. Gabriel phthalimide synthesis is preferred for synthesising primary amines.
    v. Ethylamine is soluble in water whereas aniline is not
    vi. Amines are more basic than amides
    vii.Although amino group is o – and p – directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m – nitroaniline.

  • 3)

    Arrange the following
    i. In increasing order of solubility in water, C6H5 NH2, (C2H5)2NH, C2H5NH2
    ii. In increasing order of basic strength
    a) aniline, p- toludine and p – nitroaniline
    b) C6H5 NH2, C6H5 NHCH3, C6H5NH2, p-Cl-C6- H4-NH2
    iii. In decreasing order of basic strength in gas phase
    (C2H5)NH2, (C2H5)NH, (C2H5)5N and NH3
    iv. In increasing order of boiling point
    C6H5OH, (CH3)2NH, C2H5NH2
    v. In decreasing order of the pKb values
    C2H5NH2, C6H5NHCH3.(C2H5)2 NH and CH3NH2
    vi. Increasing order of basic strength
    C2H5NH2,C6H5N(CH3)2, (C2H5)2 NH and CH3NH2
    vii. In decreasing order of basic strength

  • 4)

    How will you prepare propan – 1- amine from
    i) butane nitrile
    ii) propanamide
    ii) 1- nitropropane

  • 5)

    Identify A,B,and C
    CH3- NO2 \(\overset { { L }_{ 1 }{AlH }_{ 4 } }{ \underset { {} }{ \longrightarrow } }\) A  \(\overset { { 2CH_3 }{Ch_2Br } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {H}_{ 2 }{SO}_{ 4 } }{ \underset { {} }{ \longrightarrow } } \) C

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Identify A, B, C and D
    \(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)

  • 2)

    An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br2/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.

  • 3)

    How will you convert benzaldehyde into the following compounds?
    (i) benzophenone
    (ii) benzoic acid
    (iii) α-hydroxyphenylaceticacid.

  • 4)

    What is the action of HCN on
    (i) propanone
    (ii) 2,4-dichlorobenzaldehyde
    iii) ethanal

  • 5)

    A carbonyl compound A having molecular formula C5H10O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How is phenol prepared from
    i) chloro benzene
    ii) isopropyl benzene

  • 2)

    Write the chemical equation for Williamson synthesis of 2-ethoxy – 2- methyl pentane starting from ethanol and 2 – methyl pentan -2-ol.

  • 3)

    What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane

  • 4)

    When tertiary butyl alcohol and 1-butanol are separately treated with a few drops of KMnO4, in one case only the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction and what is that brown precipitate?

  • 5)

    Give the Grignard reagent and carbonyl compound that can be used to prepare.
    (a) CH3-CH2-CH2-OH
    (b) (CH3)2C(OH)CH2CH2CH3
    (c) C6H5CH2CH(OH)CH3

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

  • 2)

    Explain Kolbe’s reaction

  • 3)

    Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.

  • 4)

    How are the following conversions effected
    i) benzylchloride to benzylalcohol
    ii) benzyalalcohol to benzoic acid

  • 5)

    Compound (A) C6H12O2 on reduction with LiAlH4 yields two compounds B and C. The compound (B) on oxidation gave (D) which on treatment with aqueous alkali and subsequent heating furnished E. The latter on catalytic hydrogenation gave (C). Compound (D) on oxidation gave monobasic acid (molecular formula weight = 60). Deduce the structure of (A), (B), (C), (D) and (E).

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What happens when a colloidal sol of Fe(OH)3 and As2S3 are mixed?

  • 2)

    Why are lyophillic colloidal sols are more stable than lyophobic colloidal sol.

  • 3)

    What are the factors which influence the adsorption of a gas on a solid?

  • 4)

    What do you mean by activity and selectivity of catalyst?

  • 5)

    Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.

  • 2)

    What is the difference between a sol and a gel?

  • 3)

    Addition of Alum purifies water. Why?

  • 4)

    What are enzymes? Write a brief note on the mechanism of enzyme catalysis.

  • 5)

    Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The conductivity of a 0.01M solution of a 1 :1 weak electrolyte at 298K is 1.5\(\times\)10-4 S cm−1.
    i) molar conductivity of the solution
    ii) degree of dissociation and the dissociation constant of the weak electrolyte
    Given that
    \(\lambda^{0}_{cation}=248.2 \ S\) cm2 mol-1
    \(\lambda^{0}_{anlon}=51.8 \ S\) cm2 mol-1

  • 2)

    Why is AC current used instead of DC in measuring the electrolytic conductance?

  • 3)

    A current of 1.608A is passed through 250 mL of 0.5M solution of copper sulphate for 50 minutes. Calculate the strength of Cu2+ after electrolysis assuming volume to be constant and the current efficiency is 100%.

  • 4)

    Is it possible to store copper sulphate in an iron vessel for a long time?
    Given : \(E^{0}_{Cu^{2+}|Cu} = 0.34\) V and \(E^{0}_{Fe^{2+}|Fe} = -0.44\)V.

  • 5)

    Reduction potential of two metals M1 and M2 are \(E^{0}_{M^{2+}_{1}|M_{1}} = -2.3V\) and \(E^{0}_{M^{2+}_{1}|M_{1}} = 0.2V\) Predict which one is better for coating the surface of iron. Given : \(\mathrm{E}_{\mathrm{Fe}^{2+} \mid \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V}\)

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Arrange the following solutions in the decreasing order of specific conductance.
    i) 0.01M KCl
    ii) 0.005M KCl
    iii) 0.1M KCl
    iv) 0.25M KCl
    v) 0.5M KCl

  • 2)

    0.1M NaCl solution is placed in two different cells having cell constant 0.5 and 0.25 cm-1 respectively. Which of the two will have greater value of specific conductance.

  • 3)

    Can Fe3+ oxidises Bromide to bromine under standard conditions?
    Given: \({ E }_{ { Fe }^{ 3+ }|{ Fe }^{ 2+ } }^{ 0 }=0.771V\)\(\\ { E }^{0}_{ { Br }_{ 2 }|{ Br }^{ - } }=1.09V\).

  • 4)

    Two metals M1 and M2 have reduction potential values of -xV and +yV respectively. Which will liberate H2 and H2SO4.

  • 5)

    A solution of silver nitrate is electrolysed for 20 minutes with a current of 2 amperes. Calculate the mass of silver deposited at the cathode.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Derive an expression for Ostwald’s dilution law.

  • 2)

    Calculate the pH of 1.5\(\times\)10-3 M solution of Ba(OH)2

  • 3)

    The Ka value for HCN is 10-9. What is the pH of 0.4M HCN solution?

  • 4)

    Derive an expression for the hydrolysis constant and degree of hydrolysis of salt of strong acid and weak base.

  • 5)

    Calculate the pH of 0.1M CH3COOH solution. Dissociation constant of acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Define pH.

  • 2)

    50ml of 0.05M HNO3 is added to 50ml of 0.025M KOH. Calculate the pH of the resultant solution.

  • 3)

    Calculate the extent of hydrolysis and the pH of 0.1 M ammonium acetate Given that \(K_{a}=K_{b}=1.8\times10^{-5}\)

  • 4)

    A solution of 0.10M of a weak electrolyte is found to be dissociated to the extent of 1.20% at 25oC. Find the dissociation constant of the acid.

  • 5)

     Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. Ka for acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    For a reaction x + y + z\(\longrightarrow \) products the rate law is given by rate =k[x]3/2[y]1/2. What is the overall order of the reaction and what is the order of the reaction with respect to z.

  • 2)

    Write Arrhenius equation and explains the terms involved.

  • 3)

    Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of an ester at different temperatures is given below.

    t(min) 0 20 40 60
    v (ml) 20.2 25.6 29.5 32.8 50.4

    Show that the reaction is the first order reactions.

  • 4)

    Identify the order for the following reactions
    (i) Rusting of Iron
    (ii) Radioactive disintegration of 92U238
    (iii) 2A+3B⟶ products ;rate = k[A]1/2[B]2

  • 5)

    For the reaction 2x+y ⟶ L find the rate law from the following data. 

    [x]
    (min)
    [y]
    (min)
    rate
    (ms-1)
    0.2 0.02 0.15
    0.4 0.02 0.30
    0.4 0.08 1.20

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The decomposition of Cl2O7 at 500K in the gas phase to Cl2 and O2 is a first order reaction. After 1 minute at 500K, the pressure of Cl2O7 falls from 0.08 to 0.04 atm. Calculate the rate constant in s-1

  • 2)

    Explain pseudo first order reaction with an example.

  • 3)

    A gas phase reaction has energy of activation 200 kJ mol-1. If the frequency factor of the reaction is 1.6 x 1013s-1. Calculate the rate constant at 600 K.(e-40.09 = 3.8 x 10-48)

  • 4)

    A first order reaction takes 8 hours for 90% completion. Calculate the time required for 80% completion. (log 5 = 0.6989 ; log10 = 1)

  • 5)

    Show that in case of first order reaction, the time required for 99.9% completion is nearly ten times the time required for half completion of the reaction.

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Write short note on metal excess and metal deficiency defect with an example.

  • 2)

    Explain AAAA and ABABA and ABCABC type of three dimensional packing with the help of neat diagram.

  • 3)

    Calculate the percentage efficiency of packing in case of body centered cubic crystal.

  • 4)

    Experiment shows that Nickel oxide has the formula Ni0.96.O1.00. What fraction of Nickel exists as of Ni2+ and Ni3+ ions?

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain Schottky defect.

  • 2)

    Calculate the number of atoms in a fcc unit cell.

  • 3)

    Why ionic crystals are hard and brittle?

  • 4)

    What is the two dimensional coordination number of a molecule in square close packed layer?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give one test to differentiate [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl.

  • 2)

    What is linkage isomerism? Explain with an example.

  • 3)

    Classify the following ligands based on the number of donor atoms.
    a) NH3
    b) en
    c) ox2-
    d) pyridine

  • 4)

    Write the postulates of Werner’s theory.

  • 5)

    Why tetrahedral complexes do not exhibit geometrical isomerism.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give an example for complex of the type [Ma2b2c2] where a, b, c are monodentate ligands and give the possible isomers.

  • 2)

    In an octahedral crystal field, draw the figure to show splitting of d orbitals

  • 3)

    Write briefly about the applications of coordination compounds in volumetric analysis

  • 4)

    Give the difference between double salts and coordination compounds.

  • 5)

    [Ni(CN)4]2- is diamagnetic, while [NiCl4]2- is paramagnetic, explain using crystal field theory. 

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

  • 2)

    Which is more stable? Fe3+ or Fe2+ - explain.

  • 3)

    Explain the variation in E0M3+/M2+  3d series.

  • 4)

    Compare lanthanoids and actinoids.

  • 5)

    Explain why Cr2+ is strongly reducing while Mn3+ is strongly oxidizing.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are interstitial compounds?

  • 2)

    Calculate the number of unpaired electrons in Ti3+ , Mn2+ and calculate the spin only magnetic moment.

  • 3)

    Write the electronic configuration of Ce4+ and Co2+.

  • 4)

    Compare the ionization enthalpies of first series of the transition elements.

  • 5)

    Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give the uses of sulphuric acid.

  • 2)

    Give a reason to support that sulphuric acid is a dehydrating agent.

  • 3)

    Write the reason for the anomalous behaviour of Nitrogen.

  • 4)

    Write the molecular formula and structural formula for the following molecules.
    a) Nitric acid
    b) Dinitrogen pentoxide
    c) phosphoric acid (PTA)
    d) phosphine

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.

  • 2)

    How will you prepare chlorine in the laboratory?

  • 3)

    Give the uses of sulphuric acid.

  • 4)

    Write the valence shell electronic configuration of group-15 elements.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give the uses of silicones.

  • 2)

    AlCl3 behaves like a lewis acid. Substantiate this statement.

  • 3)

    Describe the structure of diborane.

  • 4)

    Write a short note on hydroboration.

  • 5)

    Write a note on metallic nature of p-block elements.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give the uses of silicones.

  • 2)

    Describe the structure of diborane.

  • 3)

    Give one example for each of the following
    (i) icosogens
    (ii) Tetragens
    (iii) pnictogens
    (iv) chalcogens

  • 4)

    Write a note on metallic nature of p-block elements.

  • 5)

    Complete the following reactions.
    a. \(B(OH)_3 + NH_3\longrightarrow \)
    b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
    c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
    d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
    e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
    f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
    g. \(2SiCl_{ 4 }+NH\)3
    h. SiCl4 + 4C2H5OH \(\rightarrow\)
    i. 2\(B+6NaOH\longrightarrow \)
    j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain zone refining process with an example.

  • 2)

    Using the Ellingham diagram,
    (A) Predict the conditions under which
    (i) Aluminium might be expected to reduce magnesia.
    (ii) Magnesium could reduce alumina.
    (B) it is possible to reduce Fe2O3 by coke at a temperature around 1200K

  • 3)

    Give the uses of zinc.

  • 4)

    Explain the electrometallurgy of aluminium.

  • 5)

    Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain zone refining process with an example.

  • 2)

    Using the Ellingham diagram,
    (A) Predict the conditions under which
    (i) Aluminium might be expected to reduce magnesia.
    (ii) Magnesium could reduce alumina.
    (B) it is possible to reduce Fe2O3 by coke at a temperature around 1200K

  • 3)

    Explain the electrometallurgy of aluminium.

  • 4)

    Explain the following terms with suitable examples.
    (i) Gangue
    (ii) slag

  • 5)

    Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Which chemical is responsible for the antiseptic properties of dettol.

  • 2)

    What are antibiotics?

  • 3)

    Name one substance which can act as both analgesic and antipyretic.

  • 4)

    How do antiseptics differ from disinfectants?

  • 5)

    What are food preservatives?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Which chemical is responsible for the antiseptic properties of dettol.

  • 2)

    What are antibiotics?

  • 3)

    Name one substance which can act as both analgesic and antipyretic.

  • 4)

    Write a note on synthetic detergents

  • 5)

    How do antiseptics differ from disinfectants?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What type of linkages hold together monomers of DNA?

  • 2)

    Give the differences between primary and secondary structure of proteins.

  • 3)

    Write the Zwitter ion structure of alanine

  • 4)

    Give any three difference between DNA and RNA.

  • 5)

    Write a short note on peptide bond.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What type of linkages hold together monomers of DNA?

  • 2)

    Give the differences between primary and secondary structure of proteins.

  • 3)

    Name the Vitamins whose deficiency cause i) rickets ii) scurvy

  • 4)

    Write the Zwitter ion structure of alanine

  • 5)

    Give any three difference between DNA and RNA.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write down the possible isomers of the C4H9NO2 give their IUPAC names.

  • 2)

    There are two isomers with the formula  CH3NO2. How will you distinguish between them?

  • 3)

    What happens when
    i. 2 – Nitropropane boiled with HCl
    ii. Nitrobenezene undergo electrolytic reduction in strongly acidic medium.
    iii. Oxidation of tert – butylamine with KMnO4
    iv. Oxidation of acetoneoxime with trifluoroperoxy acetic acid

  • 4)

    How will you convert nitrobenzene into
    i. 1,3,5 - trinitrobenzene
    ii. o and p- nitrophenol
    iii. m – nitro aniline
    iv. azoxybenzene
    v. hydrozobenzene
    vi. N – phenylhydroxylamine
    vii. aniline

  • 5)

    Identify compounds A, B and C in the following sequence of reactions.
    i) \({ C }_{ 6 }{ H }_{ 5 }NO_{ 2 }\overset { Fe/HCL }{ \longrightarrow } A\overset { HN{ O }_{ 2 } }{ \underset { 273K }{ \longrightarrow } } B\overset { { C }_{ 6 }{ H }_{ 5 }OH }{ \longrightarrow } C\)
    ii) \({ C }_{ 6 }{ H }_{ 5 }N_{ 2 }cl\overset { CuCN }{ \longrightarrow } A\overset { H_{ 2 }O/H^{ + } }{ \longrightarrow } B\overset { NH_3 }{ \longrightarrow } C\)
    iii) \({ C }{ H }_{ 3 }{ C }{ H }_{ 2 }I\overset { NaCN}{ \longrightarrow } A\overset {OH^-}{ \underset {Partial hydrolysis}{ \longrightarrow } } B\overset {NaOH+Br_2 }{ \longrightarrow } C\)
    iv) \({ C }{ H }_{ 3 }NH_{ 2 }\overset { CH_3 Br }{ \longrightarrow } A\overset { CH_{ 3 }COCl}{ \longrightarrow } B\overset { B_2H_6 }{ \longrightarrow } C\)
    v) \({ C }_{ 6 }{ H }_{ 5 }NH_{ 2 }\overset { (CH_{ 3 }CO)_{ 2 }O }{ \underset { Pyridine }{ \longrightarrow } } A\overset { HNO_{ 3 } }{ \underset { H_{ 2 }SO_{ 4 },288K }{ \longrightarrow } } B\overset { { H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow C } \)
    vi) 

    vii) \({ C }{ H }_{ 3 }CN_{ 2 }NC\overset { HgO }{ \longrightarrow } A\overset { H_{ 2 }O }{ \longrightarrow } B\overset { i) NaN{ O }_{ 2 }/HCL }{ \underset { ii){ H }_{ 2 }O }{ \longrightarrow } } \)

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    How is propanoic acid is prepared starting from
    (a) an alcohol
    (b) an alkylhalide
    (c) an alkene

  • 2)

    A Compound (A) with molecular formula C2H3N on acid hydrolysis gives (B) which reacts with thionylchloride to give compound(C). Benzene reacts with compound (C) in presence of anhydrous AlCl3 to give compound(D). Compound (D) on reduction with Zn/Hg and Conc.HCl gives (E).  Identify (A), (B), (C) (D) and (E). Write the equations.

  • 3)

    Identify X and Y.
    \({ CH }_{ 3 }CO{ CH }_{ 2 }{ CH }_{ 2 }COO{ C }_{ 2 }{ H }_{ 5 }\overset { { CH }_{ 3 }MgBr }{ \longrightarrow } X\overset { { H }_{ 3 }{ O }^{ + } }{ \longrightarrow } Y\)

  • 4)

    Identify A, B and C
     

  • 5)

    A hydrocarbon A (molecular formula C8H10) on ozonolysis gives B (C4H6O2) only. Compound C (C3H5Br) on treatment with magnesium in dry ether gives (D) which on treatment with CO2 followed by acidification gives(C). Identify A, B and C.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    State the laws of reflection.

  • 2)

    What is angle of deviation due to reflection?

  • 3)

    Give the characteristics of image formed by a plane mirror.

  • 4)

    Derive the relation between f and R for a spherical mirror.

  • 5)

    What are the Cartesian sign conventions for a spherical mirror?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.

  • 2)

    Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

  • 3)

    Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.

  • 4)

    What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
    (i) Acid catalysed hydration
    (ii) Hydroboration
    (iii) Hydroxylation using Baeyer's reagent

  • 2)

    Arrange the following in the increasing order of their boiling point and give a reason for your ordering
    (i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
    (ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol

  • 3)

    Can we use nucelophiles such as NH3,CH3- for the Nucleophilic substitution of alcohols

  • 4)

    Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Give two important characteristics of physisorption.

  • 2)

    Differentiate physisorption and chemisorption.

  • 3)

    In case of chemisorption, why adsorption first increases and then decreases with temperature?

  • 4)

    Which will be adsorbed more readily on the surface of charcoal and why? NH3 or CO2?

  • 5)

    Heat of adsorption is greater for chemisorptions than physisorption. Why?

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    In a coagulation experiment 10 mL of a colloid (X) is mixed with distilled water and 0.1M solution of an electrolyte AB so that the volume is 20 mL. It was found that all solutions containing more than 6.6 mL of AB coagulate with in 5 minutes. What is the flocculation values of AB for sol (X)?

  • 2)

    The mechanism of Fridel crafts reaction is given below
    \({ C }_{ 6 }{ H }_{ 5 }+{ { CH }_{ 3 }Cl\overset { anhydrous\\ \quad { Alcl }_{ 3 } }{ \longrightarrow } }{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }+HCl\)

  • 3)

    Thermal decomposition of KClO in presence of MnO2 proceeds as follows.
    Steps in the reaction 2KClO → 2KCl + 3Ocan be given as

  • 4)

    Formation of water due to the reaction of H2 and O2 in the presence of Cu proceeds as follows. Steps in the reaction H2 + 1/2O2 → H2O can be given as

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Describe the construction of Daniel cell. Write the cell reaction.

  • 2)

    Why is anode in galvanic cell considered to be negative and cathode positive electrode?

  • 3)

    Which of 0.1M HCl and 0.1 M KCl do you expect to have greater \(\stackrel{0}{\Lambda}_{\mathrm{m}}\)and why?

  • 4)

    A conductivity cell has two platinum electrodes separated by a distance 1.5 cm and the cross sectional area of each electrode is 4.5 sq cm. Using this cell, the resistance of 0.5 N electrolytic solution was measured as 15 Ω. Find the specific conductance of the solution.

  • 5)

    Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is 12.04 x 10-2 Sm-1.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Define anode and cathode

  • 2)

    Why does conductivity of a solution decrease on dilution of the solution.

  • 3)

    State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution.

  • 4)

    Describe the electrolysis of molten NaCl using inert electrodes

  • 5)

    The resistance of a conductivity cell is measured as 190 Ω using 0.1M KCl solution (specific conductance of 0.1M KCl is 1.3 Sm-1). When the same cell is filled with 0.003 M sodium chloride solution, the measured resistance is 6.3KΩ. Both these measurements are made at a particular temperature. Calculate the specific and molar conductance of NaCl solution.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Indentify the conjugate acid base pair for the following reaction in aqueous solution
    i) HS- (aq) + HF \(\rightleftharpoons \) F-(aq) + H2S(aq)
    ii) HPO2-+ SO32- \(\rightleftharpoons \) PO43- + HSO3-
    iii) NH4+ CO32-  \(\rightleftharpoons \) NH+ HCO3-

  • 2)

    Account for the acidic nature of HClO4 in terms of Bronsted – Lowry theory, identify its conjugate base.

  • 3)

    When aqueous ammonia is added to CuSO4 solution, the solution turns deep blue due to the formation of tetra ammine copper (II) complex,\({ [Cu({ H }_{ 2 }O)_4] }_{ (aq) }^{ 2+ }+ 4{ NH }_{ 3 }(aq)\rightleftharpoons { [Cu{ ({ NH }_{ 3 }) }_{ 4 }] }_{ (aq) }^{ 2+ }\) among H2O and NH3 Which is stronger Lewis base.

  • 4)

    The concentration of hydroxide ion in a water sample is found to be 2.5 × 10-6M. Identify the nature of the solution.

  • 5)

    A lab assistant prepared a solution by adding a calculated quantity of HCl gas 250C to get a solution with [H3O+] = 4\(\times\)10-5M. Is the solution neutral (or) acidic (or) basic.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are Lewis acids and bases? Give two example for each.

  • 2)

    Discuss the Lowry – Bronsted concept of acids and bases.

  • 3)

    Calculate the concentration of OH- in a fruit juice which contains \(2\times10^{-3}\) M, H3O+ ion. Identify the nature of the solution.

  • 4)

    Calculate the pH of 0.001M HCl solution

  • 5)

    Calculate pH of 10-7 M HCl

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration.

  • 2)

    What is an elementary reaction? Give the differences between order and molecularity of a reaction.

  • 3)

    Explain the rate determining step with an example.

  • 4)

    Describe the graphical representation of first order reaction.

  • 5)

    Write the rate law for the following reactions.
    (a) A reaction that is 3/2 order in x and zero order in y.
    (b) A reaction that is second order in NO and first order in Br2.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Define average rate and instantaneous rate.

  • 2)

    Define rate law and rate constant.

  • 3)

    Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product.

  • 4)

    What is the order with respect to each of the reactant and overall order of the following reactions?
    a) 5Br-(aq)+BrO3-(aq)+6H+(aq) ➝3Br2(l)+3H2O(l)
    The experimental rate law is Rate = k [Br][BrO3][H+]2
    b) CH3CHO(g)\(\overset { \Delta }{ \longrightarrow } \) CH4(g)+CO(g) the experimental rate law is
    Rate =K[CH3CHO]\(\frac{3}{2}\)

  • 5)

    The rate of the reaction X + 2y→ product is 4 x 10-3 mol L-1S-1, if [X] = [Y] = 0.2M and rate constant at 400K is 2 x 10-2s-1, What is the overall order of the reaction.

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Explain briefly seven types of unit cell.

  • 2)

    Distinguish between hexagonal close packing and cubic close packing.

  • 3)

    Distinguish tetrahedral and octahedral voids.

  • 4)

    What are point defects?

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Explain briefly seven types of unit cell.

  • 2)

    Distinguish between hexagonal close packing and cubic close packing.

  • 3)

    Distinguish tetrahedral and octahedral voids.

  • 4)

    What are point defects?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Ni2+ is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction.

  • 2)

    [CuCl4]2- exists while [Cul4]2- does not exist why?

  • 3)

    Calculate the ratio of \(\frac { \left[ { Ag }^{ + } \right] }{ \left[ Ag\left( NH_{ 3 } \right) _{ 2 } \right] ^{ + } } \) in 0.2 M solution of NH3. If the stability constant for the complex \([Ag(NH_{ 3 })_{ 2 }]^{ + }\) is 1.7 x 107

  • 4)

    Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.

  • 5)

    Based on VB theory explain why [Cr(NH3)6]3+ is paramagnetic, while [Ni(CN)4]2- is diamagnetic.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write the IUPAC names for the following complexes.

  • 2)

    Write the formula for the co-ordination compounds. 

  • 3)

    Arrange the following in order of increasing molar conductivity
    (i) Mg[Cr(NH3)(Cl)5]
    (ii) Cr(NH3)5Cl]3[CoF6]2
    (iii) [Cr(NH3)3Cl3]

  • 4)

    Draw all possible geometrical isomers of the complex [Co(en)2Cl2]+ and identify the optically active isomer.

  • 5)

    [Ti(H2O)6]3+ is coloured, while [Sc(H2O)6]3+ is colourless- explain.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are inner transition elements?

  • 2)

    Justify the position of lanthanoids and actinoids in the periodic table.

  • 3)

    What are actinides? Give three examples.

  • 4)

    Why Gd3+ is colourles?

  • 5)

    Explain why compounds of Cu2+ are coloured but those of Zn2+ are colourless.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are transition metals? Give four examples.

  • 2)

    Explain the oxidation states of 4d series elements.

  • 3)

    Describe the preparation of potassium dichromate.

  • 4)

    What is lanthanoid contraction and what are the effects of lanthanoid contraction?

  • 5)

    Complete the following.
    a. 3MnO42- + 4H+ ⟶?
    b. C6H5CH3 \(\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } } \)?
    c. MnO4- + Fe2+ ⟶?
    d. KMnO4 \(\overset { \triangle }{ \underset { Red\ hot }{ \longrightarrow } } \) ?
    e. Cr2O72- + 6I- + 14H+ ⟶?
    f. Na2Cr2O7 + 2KCl ⟶?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What is inert pair effect?

  • 2)

    Chalcogens belongs to p-block. Give reason.

  • 3)

    Explain why fluorine always exhibit an oxidation state of -1?

  • 4)

    What are interhalogen compounds? Give examples.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Give the oxidation state of halogen in the following.
    a) OF2
    b) O2F2
    c) Cl2O3
    d) I2O4

  • 2)

    Why fluorine is more reactive than other halogens?

  • 3)

    Give the uses of helium.

  • 4)

    What is the hybridisation of iodine in IF7? Give its structure.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Describe briefly allotropism in p- block elements with specific reference to carbon.

  • 2)

    Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF3.

  • 3)

    Give the uses of Borax

  • 4)

    What is catenation ? describe briefly the catenation property of carbon.

  • 5)

    Write a note on Fisher tropsch synthesis.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Write a short note on anamolous properties of the first element of p-block.

  • 2)

    Describe briefly allotropism in p- block elements with specific reference to carbon.

  • 3)

    Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF3.

  • 4)

    Write a note on Fisher tropsch synthesis.

  • 5)

    Give the structure of CO and CO2.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    What are the differences between minerals and ores?

  • 2)

    What are the various steps involved in the extraction of pure metals from their ores?

  • 3)

    Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

  • 4)

    Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

  • 5)

    Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    What are the differences between minerals and ores?

  • 2)

    What is the role of quick lime in the extraction of Iron from its oxide Fe2O3?

  • 3)

    Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

  • 4)

    Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

  • 5)

    Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    An example of anti-fertility drug is ____________.

  • 2)

    The drug used to induce sleep is _______________.

  • 3)

    Which of the following is a co-polymer?

  • 4)

    The polymer used in making blankets (artificial wool) is _______.

  • 5)

    Regarding cross-linked or network polymers, which of the following statement is incorrect?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statement is not true.

  • 2)

    Saccharin, an artificial sweetener is manufactured from ____________.

  • 3)

    Drugs that bind to the receptor site and inhibit its natural function are called _______.

  • 4)

    Aspirin is a/an _______.

  • 5)

    Which is the monomer of neoprene in the following?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Which of the following vitamins is water soluble?

  • 2)

    Which of the following statement is correct?

  • 3)

    If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ______.

  • 4)

    α -D (+) Glucose and β-D (+) glucose are ______.

  • 5)

    Which of the following amino acids are achiral?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The correct corresponding order of names of four aldoses with configuration given below Respectively is ______.

  • 2)

    \(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.

  • 3)

    The central dogma of molecular genetics states that the genetic information flows from______.

  • 4)

    Among the following the achiral amino acid is ______.

  • 5)

    In aqueous solution of amino acids mostly exists in ______.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

     _______.

  • 2)

    IUPAC name for the amine

  • 3)

    P Product ‘P’ in the above reaction is _______.

  • 4)

    Identify X in the sequence give below

  • 5)

    Among the following, the reaction that proceeds through an electrophilic substitution is : _______.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Which one of the following will not undergo Hofmann bromamide reaction.

  • 2)

    Assertion: Acetamide on reaction with KOH and bromine gives acetic acid
    Reason: Bromine catalyses hydrolysis of acetamide.
    Codes:
    a) if both assertion and reason are true and reason is the correct explanation of assertion.
    b) if both assertion and reason are true but reason is not the correct explanation of assertion.
    c) assertion is true but reason is false
    d) both assertion and reason are false.

  • 3)

    CH3CH2 Br \(\overset { aqNaOH }{ \underset { \Delta }{ \longrightarrow } } A\overset { { KMnO }_{ 4 }{ /H }^{ + } }{ \underset { \Delta }{ \longrightarrow } } B\overset { { NH }_{ 3 } }{ \underset { \Delta }{ \longrightarrow } } C\overset { { Br }_{ 2 }/NaOH }{ \longrightarrow } D\)  D' is________.

  • 4)

    Which one of the following nitro compounds does not react with nitrous acid.

  • 5)

    Aniline + benzoylchloride \(\overset { NaOH }{ \longrightarrow } \)C6H5 - NH - COC6 H5 this reaction is known as ______.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.

  • 2)

    In which of the following reactions new carbon – carbon bond is not formed?

  • 3)

    An alkene “A” on reaction with O3 and Zn - H2O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.

  • 4)

    Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.

  • 5)

    Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The correct structure of the product ‘A’ formed in the reaction ______.

  • 2)

    Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.

  • 3)

    In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.

  • 4)

    \({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.

  • 5)

    Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    HO CH2 CH2 – OH on heating with periodic acid gives  ______.

  • 2)

    Which of the following compound can be used as antifreeze in automobile rediators?

  • 3)

    The reactions
     is an example of  ______.

  • 4)

    One mole of an organic compound (A) with the formula C3H8O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is  ______.

  • 5)

    Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The X is _______.

  • 2)

    In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.

  • 3)

    Which one of the following is the strongest acid.

  • 4)

    on treatment with Con H2SO4, predominately gives______.

  • 5)

    Carbolic acid is _____.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Which one of the is not a surfactant?

  • 2)

    The phenomenon observed when a beam of light is passed through a colloidal solution is_______.

  • 3)

    In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K2SO4
    (i), Na3 PO4
    (ii), K4 [Fe(CN)6]
    (iii) and NaCl
    (iv) Their coagulating power should be

  • 4)

    Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?

  • 5)

    Which one of the following is an example for homogeneous catalysis?

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?

  • 2)

    Hair cream is _____.

  • 3)

    Which one of the following is correctly matched?

  • 4)

    The most effective electrolyte for the coagulation of As2S3Sol is _______.

  • 5)

    Which one of the is not a surfactant?

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    In the electrochemical cell: Zn|ZnSO4 (0.01M)|| CuSO4 (1.0M)|Cu, the emf of this Daniel cell is E1. When the concentration of ZnSO4 is changed to 1.0M and that CuSO4 changed to 0.01M, the emf changes to E2. From the above, which one is the relationship between E1 and E2?

  • 2)

    Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below:
    \({ BrO }_{ 4 }^{ - }\overset { 1.82V }{ \longrightarrow } { BrO }_{ 3 }^{ - }\overset { 1.5V }{ \longrightarrow } HBrO\overset { 1.595v }{ \longrightarrow } { Br }_{ 2 }\overset { 1.0652V }{ \longrightarrow } Br^{ - }\)
    Then the species undergoing disproportional is

  • 3)

    For the cell reaction
    2Fe3+(aq) + 2l(aq) \(\rightarrow\)2Fe2+ (aq) + 12 (aq)
    Eocell = 0.24V  = at 298K. The standard Gibbs energy (Δ, Go) of the cell reactions is:

  • 4)

    A certain current liberated 0.504gm of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution ______.

  • 5)

    A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY- and 1MZ- at 25oC. If the reduction potential of Z>Y>X, then_____.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)
    Electrolyte KCl KNO3 HCl NaOAC NaCl
    Λ-
    (Scm2 mol-1)
    149.9 145.0 426.2 91.0 126.5

    Calculate ΛoHoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25oC_______.

  • 2)

    Faraday constant is defined as_______.

  • 3)

    How many faradays of electricity are required for the following reaction to occur MnO4-→ Mn2+

  • 4)

    A current strength of 3.86 A was passed through molten Calcium oxide for 41 minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode is_______. (atomic mass of Ca is 40g / mol and 1F = 96500C).

  • 5)

    During electrolysis of molten sodium chloride, the time required to produce 0.1mole of chlorine gas using a current of 3A is _____.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    H2PO4- the conjugate base of _______.

  • 2)

    Which of the following can act as Lowery – Bronsted acid well as base?

  • 3)

    The pH of an aqueous solution is Zero. The solution is _______.

  • 4)

    The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by _______.

  • 5)

    Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The solubility of BaSO4 in water is 2.42 × 10-3gL-1 at 298K. The value of its solubility product(Ksp) will be (Given molar mass of BaSO4 =233g mol-1)

  • 2)

    pH of a saturated solution of Ca(OH)2 is 9. The Solubility product (Ksp) of Ca(OH)2 _______.

  • 3)

    Conjugate base for Bronsted acids H2O and HF are _______.

  • 4)

    Which will make basic buffer?

  • 5)

    Which of the following fluro compounds is most likely to behave as a Lewis base?

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    In a homogeneous reaction A⟶B+C+D, the initial pressure was P0 and after time t it was P expression for rate constant in terms of P0, P and t will be _____.

  • 2)

     If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be completed in_______.

  • 3)

    The correct difference between first and second order reactions is that________.

  • 4)

    After 2 hours, a radioactive substance becomes \(\left( \frac { 1 }{ 16 } \right) ^{ th }\) of original amount Then the half life (in min) is _______.

  • 5)

    This reaction follows first order kinetics. The rate constant at particular temperature is 2.303 x 10-2 hour-1. The initial concentration of cyclopropane is 0.25 M. What will be the concentration of cyclopropane after 1806 minutes? (log 2 = 0.3010)

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    For a first order reaction A ⟶ B the rate constant is x min−1. If the initial concentration of A is 0.01M, the concentration of A after one hour is given by the expression.

  • 2)

    Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behavior over the entire temperature range is _______.

  • 3)

    For the reaction, 2NH3 ⟶ N2 + 3H2, if \(\frac { -d[NH_{ 3 }] }{ dt } \) = k1[NH3], \(\frac { d[N_{ 2 }] }{ dt } =k_{ 2 }[NH_{ 3 }],\frac { d[{ H }_{ 2 }] }{ dt } \)= k3[NH3] then the relation between k1, k2 and k3 is _________.

  • 4)

    For a reaction Rate = k[acetone]3/2 then unit of rate constant and rate of reaction respectively is _______.

  • 5)

    Consider the following statements:
    (i) increase in concentration of the reactant increases the rate of a zero order reaction.
    (ii) rate constant k is equal to collision frequency A if Ea = 0
    (iii) rate constant k is equal to collision frequency A if Ea = ∞
    (iv) a plot of ln (k) vs T is a straight line.
    (v) a plot of ln (k) vs \(\left( \frac { 1 }{ T } \right) \) is a straight line with a positive slope.
    Correct statements are

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    If ‘a’ is the length of the side of the cube, the distance between the body centered atom and one corner atom in the cube will be_________.

  • 2)

    Potassium has a bcc structure with nearest neighbor distance 4.52 \(\overset{o}{A}\). Its atomic weight is 39. its density will be_______.

  • 3)

    Schottky defect in a crystal is observed when ______.

  • 4)

    Assertion: due to Frenkel defect, density of the crystalline solid decreases.
    Reason: In Frenkel defect cation and anion leaves the crystal.
    Codes:
    a) Both assertion and reason are true and reason is the correct explanation of assertion
    b) Both assertion and reason are true but reason is not the correct explanation of assertion
    c) Assertion is true but reason is false
    d) Both assertion and reason are false

  • 5)

    A two dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y respectively. The simplest formula for the compound based on the unit cell from the pattern is _______.

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Graphite and diamond are ________.

  • 2)

    An ionic compound Ax By crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube the correct formula of AxBy is ________.

  • 3)

    The ratio of close packed atoms to tetrahedral hole in cubic packing is ________.

  • 4)

    Solid CO2 is an example of ________.

  • 5)

    Assertion: monoclinic sulphur is an example of monoclinic crystal system
    Reason: for a monoclinic system, \(a\neq b\neq c\) and \(\alpha =\gamma ={ 90 }^{ 0 },\beta \neq { 90 }^{ 0 }\) 
    Codes:
    a) Both assertion and reason are true and reason is the correct explanation of assertion
    b) Both assertion and reason are true but reason is not the correct explanation of assertion.
    c) Assertion is true but reason is false.
    d) Both assertion and reason are false.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    A complex in which the oxidation number of the metal is zero is_______.

  • 2)

    Formula of tris(ethane-1, 2-diamine)iron(II)phosphate _______.

  • 3)

    Which of the following is paramagnetic in nature?

  • 4)

    Fac-mer isomerism is shown by _______.

  • 5)

    Choose the correct statement.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    An excess of silver nitrate is added to 100ml of a 0.01M solution of pentaaquachloridochromium(III)chloride. The number of moles of AgCl precipitated would be _______.

  • 2)

    A complex has a molecular formula MSO4Cl.6H2O. The aqueous solution of it gives white precipitate with Barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution. If the secondary valence of the metal is six, which one of the following correctly represents the complex?

  • 3)

    Oxidation state of Iron and the charge on the ligand NO in [Fe(H2O)5NO]SO4 are_______.

  • 4)

    As per IUPAC guidelines, the name of the complex [Co(en)2(ONO)Cl]Cl is _______.

  • 5)

    IUPAC name of the complex K3[Al(C2O4)3] is _______.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    The number of moles of acidified KMnO4 required to oxidize 1 mole of ferrous oxalate(FeC2O4) is _______.

  • 2)

    When a brown compound of Mn (A) is treated with HCl, it gives a gas (B). The gas (B) taken in excess reacts with NH3 to give an explosive compound (C). The compound A, B and C are ________.

  • 3)

    Which one of the following statements related to lanthanons is incorrect?

  • 4)

    Which of the following lanthanoid ions is diamagnetic?

  • 5)

    Which of the following oxidation states is most common among the lanthanoids?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    The alloy of copper that contain Zinc is________.

  • 2)

    Which of the following does not give oxygen on heating?

  • 3)

    In acid medium, potassium permanganate oxidizes oxalic acid to _______.

  • 4)

    Which of the following statements is not true?

  • 5)

    Permanganate ion changes to ________ in acidic medium.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    An element belongs to group 15 and 3rd period of the periodic table, its electronic configuration would be_______.

  • 2)

    Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

  • 3)

    In the brown ring test, brown colour of the ring is due to _______.

  • 4)

    On hydrolysis, PCl3 gives________.

  • 5)

    P4O6 reacts with cold water to give _______.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Which is true regarding nitrogen?

  • 2)

    Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

  • 3)

    On hydrolysis, PCl3 gives________.

  • 4)

    The basicity of pyrophosphorous acid ( H4P2O5) is _______.

  • 5)

    Assertion: Bond dissociation energy of fluorine is greater than chlorine gas
    Reason: Chlorine has more electronic repulsion than fluorine.
    Codes:
    a) Both assertion and reason are true and reason is the correct explanation of assertion.
    b) Both assertion and reason are true but reason is not the correct explanation of assertion
    c) Assertion is true but reason is false
    d) Both assertion and reason are false

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Which of the following is not sp2 hybridised?

  • 2)

    Which of the following statements is not correct?

  • 3)
      Column-I     Column-II
    A Borazole 1 B(OH)3
    B Boric acid 2 B3N3H6
    C Quartz 3 Na2[B4O5(OH)4]8H2O
    D Borax 4 SiO2
  • 4)

    Thermodynamically the most stable form of carbon is________.

  • 5)

    The stability of +1 oxidation state increases in the sequence ________.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    An aqueous solution of borax is________.

  • 2)

    Which among the following is not a borane?

  • 3)

    In diborane, the number of electrons that accounts for banana bonds is ________.

  • 4)

    Carbon atoms in fullerene with formula C60 have _______hybridisation.

  • 5)

    The basic structural unit of silicates is _______.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software View & Read

  • 1)

    Which one of the following ores is best concentrated by froth – floatation method?

  • 2)

    Zinc is obtained from ZnO by________.

  • 3)

    Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by_______.

  • 4)

    The following set of reactions are used in refining Zirconium 
    \(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
    \({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.

  • 5)

    The incorrect statement among the following is______.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software View & Read

  • 1)

    Bauxite has the composition ______.

  • 2)

    Which one of the following reaction represents calcinations?

  • 3)

    Which of the metal is extracted by Hall-Heroult process?

  • 4)

    Match items in column - I with the items of column – II and assign the correct code.

           Column-I      Column-II
    A. Cyanide process (i) Ultrapure Ge
    B Froth floatation process (ii) Dressing of ZnS
    C Electrolytic reduction (iii) Extraction of Al
    D Zone refining (iv) Extraction of Au
        (v) Purification of Ni
  • 5)

    Which one of the following is not feasible

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2020 - by QB Admin View & Read

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2019 - by QB Admin View & Read

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2020 - by QB Admin View & Read

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2019 - by QB Admin View & Read

12th Standard Chemistry Reduced Syllabus 2020-21 - by QB Admin View & Read

12th Standard Chemistry English Medium Metallurgy Important Questions - by Question Bank Software View & Read

  • 1)

    Which of the metal is extracted by Hall-Heroult process?

  • 2)

    Which of the following is not true with respect to Ellingham diagram?

  • 3)

    Concentration of copper glance is done by________.

  • 4)

    Steel is an alloy of___________

  • 5)

    Which of these is not a monomer for a high molecular mass silicone polymer?

12th Standard English Medium Chemistry Text Book Volume 2 - 2021 - by QB Admin View & Read

12th Standard English Medium Chemistry Text Book Volume 1 - 2021 - by QB Admin View & Read