11th Standard Chemistry Study material & Free Online Practice Tests - View Model Question Papers with Solutions for Class 11 Session 2019 - 2020
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Chemistry Question Papers

11th Standard Chemistry English Medium Model Question Paper Part V - by Uma - Nagapattinam - View & Read

  • 1)

    What will be the basicity of H3BO3, which is not a protic acid?

  • 2)

    The energy of an electron in the 3rd orbit of hydrogen atom is -E. The energy of an electron in the first orbit will be

  • 3)

    Match the list-I and list-II using the correct code given below the list.

      List-I   List-II
    A. Li 1. 2,8,8,1
    B. Na 2. 2,1
    C. K 3. 2,8,18,18,8,1
    D. Cs 4. 2,8,1
  • 4)

    Water gas is

  • 5)

    Plaster of Paris is obtained by heating gypsum to ______

11th Standard Chemistry English Medium Model Question Paper Part IV - by Uma - Nagapattinam - View & Read

  • 1)

    Equivalent mass of KMnO4 in acidic medium, concentrated alkaline medium and dilute basic medium respectively are \(M\over5\) , M, M. Reduced products can be:

  • 2)

    Which of the following pairs of d-orbitals will have electron density along the axes ?

  • 3)

    Gadolinium belong to '4f series.Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

  • 4)

    Water is a

  • 5)

    Which of the following are stored under oil?

11th Standard Chemistry English Medium Model Question Paper Part III - by Uma - Nagapattinam - View & Read

  • 1)

    Identify the correct statement(s) with respect to the following reaction :
    Zn + 2HCl \(\longrightarrow\) ZnCl2 + H2
    (i) Zinc is acting as an oxidant
    (ii) Chlorine is acting as a reductant
    (iii) Hydrogen is not acting as an oxidant
    (iv) Zn is acting as a reductant

  • 2)

    A macroscopic particle of mass 100 g and moving at a velocity of 100 cm S-1 will have a de Broglie wavelength of

  • 3)

    On moving from left to right across a period in the periodic table, the metallic character__________.

  • 4)

    Zeolite used to soften hardness of water is hydrated

  • 5)

    Which one of the following is known as natural insulator?

11th Standard Chemistry English Medium Model Question Paper Part II - by Uma - Nagapattinam - View & Read

  • 1)

    The compound in which mass percentage of carbon is 75% and that of hydrogen is 25% is

  • 2)

    Based on equation E = \(-2.178\times { 10 }^{ -18 }J\left( \frac { { Z }^{ 2 } }{ { n }^{ 2 } } \right) \)certain conclusions are written. Which of them is not correct?

  • 3)

    The first list of 23 chemical elements was published by _____ in the year 1789.

  • 4)

    Volume strength of 1.5 N H2O2 is

  • 5)

    The reducing power of a metal depends on various factors. Suggest the factor. which makes Li, the strongest reducing agent in aqueous solution

11th Standard Chemistry English Medium Model Question Paper Part I - by Uma - Nagapattinam - View & Read

  • 1)

    12 g of carbon-12 contains_____carbon atoms

  • 2)

    A macroscopic particle of mass 100 g and moving at a velocity of 100 cm S-1 will have a de Broglie wavelength of

  • 3)

    Electronegativity of the following elements increases in the order

  • 4)

    Non-stoichiometric hydrides are formed by

  • 5)

    Match the list-I and list-Il using the correct code given below the list.

    List-I List-II
    A Manufacture of soap 1 Na2CO3.10H2O
    B Mild antiseptic 2 Liquid Na metal
    C Softening of hard water 3 NaOH
    D Coolant in nuclear reactor 4 NaHCO3

11th Standard Chemistry English Medium Public Exam Model Question Paper June 2020 - by Uma - Nagapattinam - View & Read

  • 1)

    Identify the incorrect statement about a compound.

  • 2)

    The ratio of de Broglie wavelengths of a deuterium atom to that of an u - particle, when the velocity of the former is five times greater than that of later, is

  • 3)

    Which of the following N3-, O2-, F- is largest in size?

  • 4)

    Non-stoichiometric hydrides are formed by

  • 5)

    Half life of francium is _______

11th Standard Chemistry One Mark important Questions Book back and Creative - 2020 - by Uma - Nagapattinam - View & Read

  • 1)

    Carbon forms two oxides, namely carbon monoxide and carbon dioxide. The equivalent mass of which element remains constant?

  • 2)

    Two 22.4 litre containers A and B contains 8 g of O2 and 8 g of SO2 respectively at 273 K and 1 atm pressure, then

  • 3)

    In the reaction to NH3 + H2\(\longrightarrow \) \({ NH }_{ 4 }^{ + }+O\overline { H } \), NH3 is acidic in. the reason for its acidic is_____ 

  • 4)

    7.5g of a gas occupy 5.6 litres of volume at STP. The gas:

  • 5)

    The energy of an electron in the 3rd orbit of hydrogen atom is -E. The energy of an electron in the first orbit will be

11th Chemistry - Full Portion Five Marks Question Paper - by 8682895000 - View & Read

  • 1)

    The reaction between aluminum and ferric oxide can generate temperatures up to 3273 K and is used in welding metals. (Atomic mass of AC = 27 u atomic mass of O = 16 u )
    2Al + Fe2O3 \(\longrightarrow \) Al2O3 + 2Fe;  If in this process, 324 g of aluminum is allowed to react with 1.12 kg of ferric oxide
    i) Calculate the mass of Al2O3 formed
    ii) How much of the excess reagent is left at the end of the reaction?

  • 2)

    Explain the steps involved in ion-electron method for balancing redox reaction.

  • 3)

    What is the de Broglie wavelength (in cm) of a 160g cricket ball travelling at 140 Km hr-1.

  • 4)

    What is the de Broglie wave length of an electron, which is accelerated from the rest, through a potential difference of 100V?

  • 5)

    What are the factors influencing ionization enthalpy.

11th Chemistry - Full Portion Three Marks Question Paper - by 8682895000 - View & Read

  • 1)

    Calculate the amount of water produced by the combustion of 32 g of methane.

  • 2)

    Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wave length associated with the electron revolving arround the nucleus.

  • 3)

    What is water-gas shift reaction?

  • 4)

    How do you expect the metallic hydrides to be useful for hydrogen storage?

  • 5)

    Write a note about ortho water and para water.

11th Chemistry - Full Portion Two Marks Question Paper - by 8682895000 - View & Read

  • 1)

    What do you understand by the term mole

  • 2)

    Define equivalent mass

  • 3)

    Balance the following equations by oxidation number method - \({ K }Mno_{ 4 }+{ Na }_{ 2 }{ So }_{ 3 }\longrightarrow { MnO }_{ 2 }+{ Na }_{ 2 }{ So }_{ 4 }+KOH\)

  • 4)

    Which atom is considered to be a standard atom by 1UPAC to measure atomic masses and what is its atomic mass?

  • 5)

    Calculate the equivalent mass of the following - Sodium Hydroxide

11th Chemistry - Revision Model Question Paper 2 - by Uma - Nagapattinam - View & Read

  • 1)

    The oxidation number of fluorine in all its compounds is equal to

  • 2)

    Which of the following does not represent the mathematical expression for the Heisenberg uncertainty principle?

  • 3)

    Match the list-I and list-II using the correct code given below the list.

      List-I   List -II
    A. Jewels 1. 1.Sodium chloride
    B. Bolts and cot 2. Copper
    C. Table salt 3. Gold
    D. Utensils 4. Iron
  • 4)

    Non-stoichiometric hydrides are formed by

  • 5)

    Consider the following statements.
    (i) Alkali metals exhibit high chemical reactivity due to their low ionization energy.
    (ii) Lithium is a very soft metal and even it can be cut with a knife.
    (iii) Francium is a radioactive element in group 1 elements
    Which of the above statements is/are not correct?

11th Chemistry - Public Exam Model Question Paper 2019 - 2020 - by Uma - Nagapattinam - View & Read

  • 1)

    The number of molecules in 16g of methane is:

  • 2)

    Splitting of spectral lines in an electric field is called

  • 3)

    d-block elements form _____ compounds.

  • 4)

    Water gas is

  • 5)

    Consider the following statements
    1. Alkali metals are soft.
    2. Alkali metals show high reactivity
    3. I.E of alkali metal decreases down the group 
    Which of the following statement(s) given above is/ are correct?

11th Chemistry - Environmental Chemistry Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Which one of the followings affects chlorophyll?

  • 2)

    Green house gases cause

  • 3)

    Pick the viable pollutant among the following.

  • 4)

    Statement I: Photochemical smog is also known as oxidizing smog.
    Statement II: Photochemical smog .is chiefly composed of O3, PAN, etc

  • 5)

    Which causes water pollution?

11th Chemistry - Haloalkanes and Haloarenes Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Which of the following is secondary alkyl halide?

  • 2)

    Grignard reagent is prepared by between___________.

  • 3)

    Among the following, which is not an allylic halide?

  • 4)

    The order of stability of the carbonium ion is__________.

  • 5)

    ___________is used in fire extinguishers

11th Chemistry - Hydrocarbons Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    C6H5CH2CH2CH3 is when oxidised in the presence of alke . kMnO4, the product obtained is

  • 2)

    The number of axial hydrogen atoms in chair form of cyclohexane is

  • 3)

    Torsion strain is the repulsive interaction between

  • 4)

    In E1,reaction, the intermediate formed is

  • 5)

    How many structural isomers are possible for the molecular formula C4H8 which can undergo ozonolysis?

11th Chemistry - Basic Concept of Organic Reactions Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    The most stable carbocation is

  • 2)

    The most stable carbanion is

  • 3)

    : CH2 is an

  • 4)

    The electromeric effect is

  • 5)

    The stability of alkyl free radicals is due to

11th Chemistry - Fundamentals of Organic Chemistry Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    The compound which has one isopropyl group is

  • 2)

    The number of chain isomers possible in C5 HI2 is

  • 3)

    Number of structural isomers possible in C3H6O are

  • 4)

    Principle behind crystallization is

  • 5)

    What is the method involved in purification of chloroform and aniline?

11th Chemistry - Chemical bonding Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Find out the most favourable condition for electrovalent bonding.

  • 2)

    The sharing of valence electrons between the atoms will lead to the formation of_____

  • 3)

    Which compound has planar structure?

  • 4)

    H2O is polar, whereas BeF2 is not It is because

  • 5)

    Which of the following is a polar molecule?

11th Chemistry - Solutions Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Vapour pressure is the pressure exerted by vapours

  • 2)

    A sample of toothpaste weighting 500g, on analysis was found to contain 0.2g of fluorine. The concentration of fluorine in ppm is

  • 3)

    For associative solutes

  • 4)

    For a non-electrolytic solution

  • 5)

    The normality of 10% weight/volume) acetic and is

11th Chemistry - Physical and Chemical Equilibrium Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Solubility of carbon dioxide gas in cold water can be increased by

  • 2)

    Which one of the following is incorrect statement?

  • 3)

    Hydrogen (a moles) and iodine (b moles) .react to give 2x moles of the HI at equilibrium. The total number of moles at equilibrium is

  • 4)

    XY2 dissociates as,\(XY_{ 2\left( g \right) }\rightleftharpoons { XY }_{ \left( g \right) }+Y_{ \left( g \right) }\) Initial pressure of XY2 is 600mm Hg. The total pressure at equilibrium is 800mm Hg. Assuming volume of system to remain constant, the value of Kp is

  • 5)

    A state of equilibrium is reached when

11th Chemistry - Thermodynamics Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    For an adiabatic process

  • 2)

    Which among the following is an intensive property?

  • 3)

    For an isochoric process, ΔU=-----

  • 4)

    If the heat flows out of the system into the surrounding, the q value becomes -------

  • 5)

    The extensive and intensive properties respectively are

11th Chemistry - Gaseous State Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Pressure is _____________

  • 2)

    The standard atmospheric pressure is the pressure that supports a column of mercury exactly ___________ high at 0° C at sea level.

  • 3)

    The mathematical expression V\(\infty \) n relates to _____________

  • 4)

    Pick the equation that gives you the relationship between molecular mass and density.

  • 5)

    When the gas behaves ideally, the compression factor Z is

11th Chemistry - Periodic Classification Of Elements Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    The electronic configuration of the elements A and Bare 1s2, 2s 2,2p6,3s2 and 1s2, 2s2,2p5 respectively. The formula of the ionic compound that can be formed between these elements is

  • 2)

    The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called

  • 3)

    Period of an element is represented by _____ quantum number

  • 4)

    The first list of 23 chemical elements was published by _____ in the year 1789.

  • 5)

    In the third period the first ionization potential is of the order.

11th Chemistry - Hydrogen Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Water gas is

  • 2)

    If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be

  • 3)

    The cause of permanent hardness of water is due to

  • 4)

    Deuterium consist of _____________

  • 5)

    The radioactive isotope of hydrogen is __________

11th Chemistry - Alkali and Alkaline Earth Metals Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    For alkali metals, which one of the following trends is incorrect?

  • 2)

    Which of the following compounds will not evolve H2 gas on reaction with alkali metals?

  • 3)

    Lithium shows diagonal relationship with

  • 4)

    The radioactive element of group 1 is ______

  • 5)

    Half life of francium is _______

11th Chemistry - Quantum Mechanical Model of Atom Important Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The energies E1and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie \(\lambda \)1 and\(\lambda \)2 will be

  • 2)

    For d-electron, the orbital angular momentum is

  • 3)

    The subsidiary quantum number decides ______

  • 4)

    Which of the following configuration is correct for iron?

  • 5)

    How many electrons in an atom with atomic number 105 can have (n + I) = 8 ? 

11th Chemistry - Basic Concepts of Chemistry and Chemical Calculations Important Questions - by Uma - Nagapattinam - View & Read

  • 1)

    An element X has the following isotopic Composition 200X = 90%, 199X = 8% and 202X = 2% The Weighted average atomic mass of the element X is closet to  

  • 2)

    When 6.3g of sodium bicarbonate is added to 30g of the acetic acid solution, the residual solution is found to weigh 33g. The number of moles of carbon dioxide released in the reaction is

  • 3)

    Fe2 + \(\longrightarrow\) Fe3+ + e- is a ________ reaction.

  • 4)

    7.5 g of a gas occupies a volume of 5.6 litres at 0° C and 1 atm pressure. The gas is

  • 5)

    Among the three metals, zinc, copper and silver, the electron releasing tendency decreases in the following order.

11th Chemistry - Half Yearly Model Question Paper 2019 - by Uma - Nagapattinam - View & Read

  • 1)

    40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left. after cooling to room temperature is

  • 2)

    Two electrons occupying the same orbital are distinguished by

  • 3)

    Law of triad was unable to explain for the element

  • 4)

    Heavy water is used as

  • 5)

    The suspension of slaked lime in water is known as

11th Standard Chemistry - Term II Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    Carbon forms two oxides, namely carbon monoxide and carbon dioxide. The equivalent mass of which element remains constant?

  • 2)

    Splitting of spectral lines in an electric field is called

  • 3)

    What would be the IUPAC name for an element with atomic number 222?

  • 4)

    Ionic hydrides are formed by

  • 5)

    Zeolite used to soften hardness of water is hydrated

11th Standard Chemistry - Environmental Chemistry Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    Which of the following is natural and human disturbance in ecology?

  • 2)

    The pH of normal rain water is

  • 3)

    Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using __________

  • 4)

    Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be

  • 5)

    Which among the following is a green house gas?

11th Standard Chemistry - Haloalkanes and Haloarenes Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    With respect to the position of – Cl in the compound CH3 – CH = CH – CH2 – Cl, it is classified as

  • 2)

    What should be the correct IUPAC name of diethyl chloromethane?

  • 3)

    Benzene reacts with Cl2 in the presence of FeCl3 and in absence of sunlight to form

  • 4)

    Freon-12 is manufactured from tetrachloro methane by

  • 5)

    The carbo cation formed in SN1 reaction of al kyl halide in the slow step is

11th Standard Chemistry - Environmental Chemistry Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?

  • 2)

    From where does ozone come in the photo chemical smog?

  • 3)

    Even though the use of pesticides increases the crop production, they adversely affect the living organisms. Explain the function and the adverse effects of the pesticides.

  • 4)

    On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?

  • 5)

    Explain how oxygen deficiency is caused by carbon monoxide in our blood? Give its effect

11th Standard Chemistry - Haloalkanes and Haloarenes Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    An organic compound (A) with molecular formula C2H5Cl reacts with KOH gives compounds (B) and with alcoholic KOH gives compound (C). Identify (A),(B), and (C)

  • 2)

    Simplest alkene (A) reacts with HCl to form compound (B).Compound (B) reacts with ammonia to form compound (C) of molecular formula C2H7N.Compound (C) undergoes carbylamine test. Identify (A), (B), and (C)

  • 3)

    A hydrocarbon C3H6 (A) reacts with HBr to form compound (B). Compound (B) reacts with aqueous potassium hydroxide to give (C) of molecular formula C3H6O.what are (A) (B) and (C). Explain the reactions.

  • 4)

    Two isomers (A) and (B) have the same molecular formula C2H4Cl2. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C2H4O. Compound (B) reacts with aqueous KOH gives compound(D) of molecular formula C2H6O2. Identify (A), (B), (C) and (D).

  • 5)

    Enlist the applications of haloalkanes.

11th Chemistry - Hydrocarbons Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    How many types of polymerisation are·possible in alkynes?

  • 2)

    State Huckel's rule of aromaticity and explain it interms of cyclopentadiene, cycloxtateraene and cyclopropenylcation.

  • 3)

    Among anthracene and cyclopentadiene which is aromatic? Give reason for your answer.

  • 4)

    What are vicinal dihalides? How will you prepane alkene from vicinal dihaldes?

  • 5)

    Why alkenes are more reactive than alkanes?

11th Chemistry - Basic Concept of Organic Reactions Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    While writing the resonance structures, what are the rules to be followed?

  • 2)

    Distinguish between electrophiles and nucleophiles

  • 3)

    What are the possible types of electron movement? Represent them by clearly indicating the electron shift.

  • 4)

    Discuss the reason behind the classification of inductive effect into +I and -I effect.

  • 5)

    Explain the substitution reaction in detail with suitable examples.

11th Chemistry - Fundamentals of Organic Chemistry Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Write structural formula for the following compounds
    (i) Cyclohexa-1, 4-diene
    (ii) Ethynyl cyclohexane.

  • 2)

    Write structural formula for the following compounds
    (i) m - dinitrobenzene
    (ii) p-dichloro benzene
    (iii)1, 3, 5- Trimethyl benzene.

  • 3)

    Write all the possible isomers of molecular formula C4H10O and identify the isomerisms found in them.

  • 4)

    In an estimation of sulphur by carius method, 0.2175 g of the substance gave 0.5825 g of BaSO4 calculate the percentage composition of S in the compound.

  • 5)

    0.16 g of an organic compound was heated in a carius tube and H2SO4 acid formed was precipitated with BaCl2. The mass of BaSO4 was 0.35g. Find the percentage of sulphur [30.04]

11th Chemistry - Chemical Bonding Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    What is covalent bond? Give suitable examples to represent single, double and triple covalent bonds.

  • 2)

    Define co-ordinate covalent bond.

  • 3)

    Bond angle in PH+4 is higher than in PH3. Why?

  • 4)

    Compare the bond angles of water and dimethyl ether and identify which one has the greater bond angle? Give appropriate reason for your answer

  • 5)

    Identify tbe paramagnetic species among following using molecular orbital theory.

11th Chemistry - Solutions Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    If 5.6 g of KOH is present in (a) 500 mL and (b) 1 litre of solution, calculate the molarity of each of these solutions.

  • 2)

    Describe how would you prepare the following solution from pure solute and solvent
    (a) 1 L of aqueous solution of 1.5 M CoCl2.
    (b) 500 mL of 6.0% (V/V) aqueous methanol solution.

  • 3)

    Vapour pressure of a pure liquid A is 10.0 torr at 27°C. The vapour pressure is lowered to 9.0 torr on dissolving one gram of B in 20 g of A. If the molar mass of A is 200 then calculate the molar mass of B.

  • 4)

    An aqueous solution of 2% nonvolatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is the molar mass of the solute when PA is 1.013 bar?

  • 5)

    Ethylene glycol (C2H6O2) can be at used as an antifreeze in the radiator of a car. Calculate the temperature when ice will begin to separate from a mixture with 20 mass percent of glycol in water used in the car radiator. Kf for water = 1.86 K Kg mol-1 and molar mass of ethylene glycol is 62 g mol-1.

11th Chemistry - Physical and Chemical Equilibrium Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The value of Kc for the following reaction at 717 K is 48.

  • 2)

    The value of Kc for the reaction

  • 3)

    One mole of H2 and one mole of I2 are allowed to attain equilibrium. If the equilibrium mixture contains 0.4 mole of HI. Calculate the equilibrium constant.

  • 4)

    The equilibrium concentrations of NH3, N2 and H2 are 1.8 × 10-2 M, 1.2 × 10-2 M and 3 × 10-2 M respectively. Calculate the equilibrium constant for the formation of NH3 from N2 and H2. [Hint: M= mol lit-1]

  • 5)

    For an equilibrium reaction Kp = 0.0260 at 25° C ΔH= 32.4 kJmol-1, calculate Kp at 37° C

11th Standard Chemistry - Hydrocarbons Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    Which of the following is optically active

  • 2)

    The compound that will react most readily with gaseous bromine has the formula

  • 3)

    The major product formed when 2 – bromo – 2 – methyl butane is refluxed with ethanolic KOH is

  • 4)

    Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

  • 5)

    An alkane is obtained by decarboxylation of sodium propionate. Same alkane can be prepared by

11th Chemistry - Basic concept of organic reactions Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    What is the hybridisation state of benzyl carbonium ion?

  • 2)

    Which of the following species is not electrophilic in nature?

  • 3)

    Which of the group has highest +I effect?

  • 4)

    Which of the following carbocation will be most stable?

  • 5)

    The geometrical shape of carbocation is

11th Standard Chemistry - Thermodynamics Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    State the various statements of second law of thermodynamics.

  • 2)

    1 mole of an ideal gas, maintained at 4.1 atm and at a certain temperature, absorbs heat 3710 J and expands to 2 litres. Calculate the entropy change in expansion process.

  • 3)

    At 33K, N2O4 is fifty percent dissociated. Calculate the standard free energy change at this temperature and at one atmosphere

  • 4)

    The standard enthalpies of formation of SO2 and SO3 are -297 kJ mol-1 and -396 kJ mol-1 respectively. Calculate the standard enthalpy of reaction for the reaction: SO2 + \(\frac{1}{2}\)O2⟶SO3

  • 5)

    For the reaction at 298 K: 2A +B ⟶ C.  ΔH = 400 J mol-1; ΔS = 0.2 JK-1 mol-1 Determine the temperature at which the reaction would be spontaneous.

11th Standard Chemistry - Periodic Classification Of Elements Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Energy of an electron in the ground state of the hydrogen atom is -2.8 x 10-18 J. Calculate the ionisation enthalpy of atomic hydrogen in terms of kJ mol-1.

  • 2)

    The electronic configuration of atom is one of the important factor which affects the value of ionisation potential and electron gain enthalpy. Explain.

  • 3)

    In what period and group will an element with Z = 118 will be present?

  • 4)

    Justify that the fifth period of the periodic table should have 18 elements on the basis of quantum numbers.

  • 5)

    Elements a, b, c and d have the following electronic configurations:
    a: 1s2, 2s2, 2p6
    b: 1s2, 2s2, 2p6, 3s2, 3p1
    c: 1s2, 2s2, 2p6, 3s2, 3p6
    d: 1s2, 2s2, 2p1
    Which elements among these will belong to the same group of periodic table.

11th Standard Chemistry - Gaseous State Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    A sample of gas at 15°C at 1 atm. has a volume of 2.58 dm3. When the temperature is raised to 38°C at 1 atm does the volume of the gas increase? If so, calculate the final volume.

  • 2)

    A sample of gas has a volume of 8.5 dm3 at an unknown temperature. When the sample is submerged in ice water at 0 °C, its volume gets reduced to 6.37 dm3. What is its initial temperature?

  • 3)

    Of two samples of nitrogen gas, sample A contains 1.5 moles of nitrogen in a vessel of volume of 37.6 dm3 at 298K, and the sample B is in a vessel of volume 16.5 dm3 at 298K. Calculate the number of moles in sample B.

  • 4)

    Hydrochloric acid is treated with a metal to produce hydrogen gas. Suppose a student carries out this reaction and collects a volume of 154.4 x 10-3 dm3 of a gas at a pressure of 742 mm of Hg at a temperature of 298 K. What mass of hydrogen gas (in mg) did the student collect?

  • 5)

    It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N2 gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas?

11th Standard Chemistry - Alkali and Alkaline Earth Metals Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Write balanced chemical equation for each of the following chemical reactions.
    (i) Lithium metal with nitrogen gas
    (ii) heating solid sodium bicarbonate
    (iii) Rubidum with oxgen gas
    (iv) solid potassium hydroxide with CO2
    (v) heating calcium carbonate
    (vi) heating calcium with oxygen

  • 2)

    Give the systematic names for the following
    (i) milk of magnesia
    (ii) lye
    (iii) lime
    (iv) Caustic potash
    (v) washing soda
    (vi) soda ash
    (vii) trona

  • 3)

    Mention the uses of plaster of paris

  • 4)

    Why sodium hydroxide is much more water soluble than chloride?

  • 5)

    Write the chemical equations for the reactions involved in solvay process of preparation of sodium carbonate.

11th Chemistry - Quantum Mechanical Model of Atom Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Which one among the following salts is more stable? Ferrous and ferric salts

  • 2)

    State and explain pauli's exclusion principle

  • 3)

    Explain briefly the time independent schrodinger wave equation?

  • 4)

    Calculate the total number of angular nodes and radial nodes present in 3p-orbital.

  • 5)

    Describe the Autbau principle

11th Chemistry - Hydrogen Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Write the expected formulas for the hydrides of 4th period elements. What is the trend in the formulas? In what way the first two numbers of the series different from the others?

  • 2)

    Complete the following chemical reactions and classify them in to (a) hydrolysis (b) redox (c) hydration reactions.
    (1) KMnO4 + 3H2O2 ➝ 2MnO2+2KOH+2H2O+3O2
    (2) CrCl3+H2O ➝
    (3) CaO + H2O ➝

  • 3)

    Hydrogen peroxide can function as an oxidising agent as well as reducing agent. substantiate this statement with suitable examples.

  • 4)

    What are isotopes? Write the names of isotopes of hydrogen.

  • 5)

    Give the uses of heavy water,

11th Chemistry - Basic Concepts of Chemistry and Chemical Calculations Three Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    In a reaction x + y + Z2 \(\longrightarrow \) xyz2 identify the Limiting reagent if any, in the following reaction mixtures.
    (a) 200 atoms of x +200 atoms of y + 50 molecules of z2
    (b) 1 mol of x + 1 mol of y + 3 mol of z2
    (c) 50 atoms of x + 25 atoms of y + 50 molecules of z2
    (d) 2.5 mol of x + 5 mol of y + 5 mol of z2

  • 2)

    Mass of one atom of an element is 6.645 x 10-23g. How many moles of element are there in 0.320 kg.

  • 3)

    What is the difference between molecular mass and molar mass? Calculate the molecular mass and molar mass for carbon monoxide.

  • 4)

    What is the empirical formula of the following?
    i) Fructose (C6 H12O6) Found in honey
    ii) Caffeine  (C8H10N4 O2) a substance found in tea and Coffee

  • 5)

    How many moles of ethane is required to produce 44 g of CO2(g) after combustion

11th Chemistry - Fundamentals of Organic Chemistry Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    Select the molecule which has only one \(\pi\) bond.

  • 2)

    Which one of the following names does not fit a real name?

  • 3)

    The number of stereoisomers of 1, 2 – dihydroxy cyclopentane

  • 4)

    Lassaigne’s test for the detection of nitrogen fails in

  • 5)

    In an organic compound, phosphorus is estimated as

11th Chemistry - Chemical bonding Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    In which of the following Compounds does the central atom obey the octet rule?

  • 2)

    Which of the following is electron deficient?

  • 3)

    Which one of the following is the likely bond angles of sulphur tetrafluoride molecule?

  • 4)

    The correct order of O-O bond length in hydrogen peroxide, ozone and oxygen is

  • 5)

    Xe F2 is isostructural with

Class 11th Chemistry - Environmental Chemistry Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Define smog.

  • 2)

    Which is considered to be earth’s protective umbrella? Why?

  • 3)

    A person was using water supplied by corporation. Due to shortage of water he started using underground water. He felt laxative effect. What could be the cause?

  • 4)

    What is green chemistry?

  • 5)

    Why photochemical smog is called so?

Class 11th Chemistry - Haloalkanes and Haloarenes Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Give reasons for polarity of C-X bond in halo alkane.

  • 2)

    Why is it necessary to avoid even traces of moisture during the use of Grignard reagent?

  • 3)

    What happens when acetyl chloride is treated with excess of CH3MgI?

  • 4)

    What happens when chloroform reacts with oxygen in the presence of sunlight?

  • 5)

    Mention any three methods of preparation of haloalkanes from alcohols.

Class 11th Chemistry - Hydrocarbons Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    How is propyne prepared from an alkyene dihalide?

  • 2)

    Describe the mechanism of Nitration of benzene.

  • 3)

    How does Huckel rule help to decide the aromatic character of a compound.

  • 4)

    Suggest the route for the preparation of the following from benzene.
    1) 3 – chloro nitrobenzene
    2) 4 – chlorotoluene
    3) Bromo benzene
    4) m - dinitro benzene.

  • 5)

    Write the chemical equations for combustion of propane.

Class 11th Chemistry - Basic concept of organic reactions Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    What are electrophiles and nucleophiles? Give suitable examples for each.

  • 2)

    Show the heterolysis of covalent bond by using curved arrow notation and complete the following equations.
    Identify the nucleophile is each case.
    (i) CH3 - Br + KOH →
    (ii) CH3 - OCH3 + HI →

  • 3)

    Explain inductive effect with suitable example.

  • 4)

    Explain electromeric effect.

  • 5)

    Which of the two is expected to be more stable and why? \({ O }_{ 2 }NC{ H }_{ 2 }C{ H }_{ 2 }\overset { - }{ O } \) (or) \(C{ H }_{ 3 }C{ H }_{ 2 }\overset { - }{ O } \)

Class 11th Chemistry - Fundamentals of Organic Chemistry Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Describe the classification of organic compounds based on their structure.

  • 2)

    Write a note on homologous series.

  • 3)

    Write the molecular and possible structural formula of the first four members of homologous series of carboxylic acids.

  • 4)

    Describe the reactions involved in the detection of nitrogen in an organic compound by Lassaigne method.

  • 5)

    Briefly explain geometrical isomerism in alkene by considering 2- butene as an example.

Class 11th Chemistry - Chemical Bonding Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Draw the M.O diagram for oxygen molecule calculate its bond order and show that O2 is paramagnetic.

  • 2)

    Draw MO diagram of CO and calculate its bond order.

  • 3)

    What is dipole moment?

  • 4)

    Linear form of carbondioxide molecule has two polar bonds. yet the molecule has Zero dipolement why?

  • 5)

    Define bond energy.

Class 11th Chemistry - Solutions Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    A litre of sea water weighing about 1.05 kg contains 5 mg of dissolved oxygen (O2). Express the concentration of dissolved oxygen in ppm.

  • 2)

    Explain why the aquatic species are more comfortable in cold water during winter season rather than warm water during the summer.

  • 3)

    Define (i) molality (ii) Normality.

  • 4)

    State and explain Henry’s law

  • 5)

    State Raoult law and obtain expression for lowering of vapour pressure when nonvolatile solute is dissolved in solvent.

11th Chemistry - Physical and Chemical Equilibrium Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    If there is no change in concentration, why is the equilibrium state considered dynamic?

  • 2)

    For a given reaction at a particular temperature, the equilibrium constant has constant value. Is the value of Q also constant? Explain.

  • 3)

    What the relation between KP and KC. Give one example for which KP is equal to KC.

  • 4)

    Consider the following reactions,
    a) H2(g) + I2(g) ⇌ 2 HI
    b) CaCO3 (s) ⇌ CaO (s) + CO2(g)
    c) S(s) + 3F2 (g) ⇌ SF6 (g)
    In each of the above reaction find out whether you have to increase (or) decrease the volume to increase the yield of the product.

  • 5)

    State law of mass action.

11th Standard Chemistry - Solutions Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    The molality of a solution containing 1.8g of glucose dissolved in 250g of water is

  • 2)

    Which one of the following is incorrect for ideal solution?

  • 3)

    Osometic pressure (p) of a solution is given by the relatio

  • 4)

    Normality of 1.25M sulphuric acid is

  • 5)

    Phenol dimerises in benzene having van't Hoff factor 0.54. What is the degree of association?

11th Standard Chemistry - Physical and Chemical Equilibrium Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    If Kb and Kf for a reversible reactions are 0.8 ×10–5 and 1.6 × 10–4 respectively, the value of the equilibrium constant is,

  • 2)

    The equilibrium constant for a reaction at room temperature is K1 and that at 700 K is K2. If K1 > K2, then

  • 3)

    An equilibrium constant of 3.2 × 10–6 for a reaction means, the equilibrium is

  • 4)

    Equimolar concentrations of H2 and I2 are heated to equilibrium in a 1 litre flask. What percentage of initial concentration of Hhas reacted at equilibrium if rate constant for both forward and reverse reactions are equal

  • 5)

    For the formation of Two moles of SO3(g) from SO2 and O2, the equilibrium constant is K1. The equilibrium constant for the dissociation of one mole of SO3 into SO2 and O2 is

11th Chemistry - Thermodynamics Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Define molar heat capacity. Give its unit

  • 2)

    Define the calorific value of food. What is the unit of calorific value?

  • 3)

    Define enthalpy of neutralization

  • 4)

    What is lattice energy?

  • 5)

    Give Kelvin statement of second law of thermodynamics.

11th Chemistry - Gaseous State Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Name two items that can serve as a model for Gay Lusaac' law and explain.

  • 2)

    Give the mathematical expression that relates gas volume and moles. Describe in words what the mathematical expression means.

  • 3)

    Can a Vanderwaals gas with a=0 be liquefied? explain.

  • 4)

    Suppose there is a tiny sticky area on the wall of a container of gas. Molecules hitting this area stick there permanently. Is the pressure greater or less than on the ordinary area of walls?

  • 5)

    Distinguish between diffusion and effusion.

11th Chemistry - Alkali and Alkaline Earth Metals Two Marks Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Substantiate lithium fluoride has the lowest solubility among group one metal fluorides.

  • 2)

    Beryllium halides are Covalent whereas magnesium halides are ionic why?

  • 3)

    Write balanced chemical equation for the following processes
    (a) heating calcium in oxygen
    (b) heating calcium carbonate
    (c) evaporating a solution of calcium hydrogen carbonate
    (d) heating calcium oxide with carbon

  • 4)

    An alkali metal (x) forms a hydrated sulphate, X2SO4•10H2O. Is the metal more likely to be sodium (or) potassium.

  • 5)

    Why alkaline earth metals are harder than alkali metals.

11th Chemistry - Term 1 Model Question Paper - by Kumar - Pollachi - View & Read

  • 1)

    An element X has the following isotopic Composition 200X = 90%, 199X = 8% and 202X = 2% The Weighted average atomic mass of the element X is closet to  

  • 2)

    The characteristic feature of orderly arrangement of molecules belongs to

  • 3)

    The maximum number of electrons in a sub shell is given by the expression

  • 4)

    The correct order of electron gain enthalpy with negative sign of F, Cl, Br and I having atomic number 9, 17, 35 and 53 respectively is

  • 5)

    The correct order of decreasing electronegativity values among the elements X, Y, Z and A with atomic numbers 4, 8, 7 and 12 respectively

11th Chemistry Chapter 4 Hydrogen Two Marks Question - by Uma - Nagapattinam - View & Read

  • 1)

    Explain why hydrogen is not placed with the halogen in the periodic table.

  • 2)

    Discuss the three types of Covalent hydrides.

  • 3)

    NH3 has exceptionally high melting point and boiling point as compared to those of the hydrides of the remaining element of group 15. Explain.

  • 4)

    What is para hydrogen?

  • 5)

    Write short notes on Deuterium.

11th Chemistry - Periodic Classification Of Elements Two Marks Question - by Uma - Nagapattinam - View & Read

  • 1)

    What are isoelectronic ions? Give examples.

  • 2)

    Magnesium loses electrons successively to form Mg+, Mg2+ and Mg3+ ions. Which step will have the highest ionisation energy and why?

  • 3)

    Define electro negativity.

  • 4)

    Give the general electronic configuration of lanthanides and actinides.

  • 5)

    Briefly outline anomalies of Mandeleev's periodic table

11th Chemistry - Quantum Mechanical Model of Atom Two Marks Question - by Uma - Nagapattinam - View & Read

  • 1)

    The stabilisation of a half filled d - orbital is more pronounced than that of the p-orbital why?

  • 2)

    How many orbitals are possible for n =4?

  • 3)

    How fast must a 54g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green light 5400\(\overset { 0 }{ A } \) ?

  • 4)

    Give the electronic configuration of Mn2+ and Cr3+

  • 5)

    What is the charge and mass of an electron?

11th Chemistry Unit 1 Basic Concepts of Chemistry and Chemical Calculations Two Marks Question - by Uma - Nagapattinam - View & Read

  • 1)

    What do you understand by the term mole

  • 2)

    Define equivalent mass

  • 3)

    What do you understand by the term oxidation number?

  • 4)

    Balance the following equations by ion electron method \(Zn+{ NO }_{ 3 }^{ - }\longrightarrow { Zn }^{ 2+ }+No\)

  • 5)

    Balance the following equations by oxidation number method - \({ K }Mno_{ 4 }+{ Na }_{ 2 }{ So }_{ 3 }\longrightarrow { MnO }_{ 2 }+{ Na }_{ 2 }{ So }_{ 4 }+KOH\)

11th Chemistry - Term 1 Five Mark Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    The reaction between aluminum and ferric oxide can generate temperatures up to 3273 K and is used in welding metals. (Atomic mass of AC = 27 u atomic mass of O = 16 u )
    2Al + Fe2O3 \(\longrightarrow \) Al2O3 + 2Fe;  If in this process, 324 g of aluminum is allowed to react with 1.12 kg of ferric oxide
    i) Calculate the mass of Al2O3 formed
    ii) How much of the excess reagent is left at the end of the reaction?

  • 2)

    Calculate the energy required for the process.
    \({ He }_{ (g) }^{ + }\longrightarrow { He }_{ (g) }^{ 3+ }+{ e }^{ - }\)
    The ionisation energy for the H atom in its ground state is -13..6 ev atom-1

  • 3)

    Suppose that the uncertainty in determining the position of an electron in an orbit is 0.6 \(\mathring{A}\) . What is the uncertainty in its momentum

  • 4)

    Explain the diagonal relationship.

  • 5)

    What is screening effect? Briefly give the basis for pauling's scale of electronegativity.

11th Chemistry Quarterly Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    An element X has the following isotopic Composition 200X = 90%, 199X = 8% and 202X = 2% The Weighted average atomic mass of the element X is closet to  

  • 2)

    1 g of an impure sample of magnesium carbonate (containing no thermally decomposable impurities) on complete thermal decomposition gave 0.44 g of carbon dioxide gas. The percentage of impurity in the sample is ______________

  • 3)

    Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidising behaviour?

  • 4)

    The oxidation number of oxygen in O2 is _______________

  • 5)

    Which one of the following represents 180g of water?

TN 11th Standard Chemistry Official Model Question Paper 2019 - 2020 - by Uma - Nagapattinam - View & Read

11th Chemistry - Environmental Chemistry Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The gaseous envelope around the earth is known as atmosphere. The region lying between an altitudes of 11-50 km is __________

  • 2)

    Photo chemical smog formed in congested metropolitan cities mainly consists of

  • 3)

    Ozone depletion will cause

  • 4)

    Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using __________

  • 5)

    Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be

11th Chemistry Chapter 14 Haloalkanes and Haloarenes Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The IUPAC name of  is

  • 2)

    Of the following compounds, which has the highest boiling point?

  • 3)

    What should be the correct IUPAC name of diethyl chloromethane?

  • 4)

    Benzene reacts with Cl2 in the presence of FeCl3 and in absence of sunlight to form

  • 5)

    Which of the following reagent is helpful to differentiate ethylene dichloride and ethylidene chloride?

11th Chemistry Chapter 13 Hydrocarbons Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is

  • 2)

    An alkyl bromide (A) reacts with sodium in ether to form 4, 5– diethyloctane, the compound (A) is

  • 3)

    The C – H bond and C – C bond in ethane are formed by which of the following types of overlap

  • 4)

    The general formula for cyclo alkanes

  • 5)

    The compound that will react most readily with gaseous bromine has the formula

11th Chemistry Unit 12 Basic concept of organic reactions Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    For the following reactions
    (A) CH3CH2CH2Br + KOH → CH2 = CH2 + KBr + H2O
    (B) (CH3)3CBr + KOH → (CH3)3 COH + KBr
    (C) 
    Which of the following statement is correct?

  • 2)

    What is the hybridisation state of benzyl carbonium ion?

  • 3)

    Decreasing order of nucleophilicity is

  • 4)

    Which of the following species is not electrophilic in nature?

  • 5)

    Homolytic fission of covalent bond leads to the formation of

11th Chemistry Unit 11 Fundamentals of Organic Chemistry Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Select the molecule which has only one \(\pi\) bond.

  • 2)

    In the hydrocarbo \(\overset { 7 }{ { CH }_{ 3 } } -\overset { 6 }{ { CH }_{ 2 } } -\overset { 5 }{ CH } =\overset { 4 }{ CH } -\overset { 3 }{ { CH }_{ 2 } } -\overset { 2 }{ CH } =\overset { 1 }{ CH } \) the state of hybridisation of carbon 1,2,3,4 and 7 are in the following sequence.

  • 3)

    Which one of the following names does not fit a real name?

  • 4)

    IUPAC name of \({ CH }_{ 3 }-\overset { \underset { | }{ H } }{ \underset { \overset { | }{ { C }_{ 2 }{ H }_{ 5 } } }{ C } } -\overset { \underset { | }{ { C }_{ 4 }{ H }_{ 9 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -{ CH }_{ 3 }\) is

  • 5)

    The IUPAC name of the compound  is

11th Chemistry Unit 10 Chemical bonding Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    In which of the following Compounds does the central atom obey the octet rule?

  • 2)

    In the molecule O= C = OB, the formal charge on OA, C and OB are respectively.

  • 3)

    The ratio of number of sigma (σ) and pi (л) bonds in 2- butynal is

  • 4)

    Assertion: Oxygen molecule is paramagnetic.
    Reason: It has two unpaired electron in its bonding molecular orbital.

  • 5)

    In ClF3, NF3 and BF3 molecules the chlorine, nitrogen and boron atoms are

11th Chemistry Unit 9 Solutions Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The Henry's law constant for the solubility of Nitrogen gas in water at 350 K is 8 × 104 atm. The mole fraction of nitrogen in air is 0.5. The number of moles of Nitrogen from air dissolved in 10 moles of water at 350K and 4 atm pressure is

  • 2)

    Which one of the following is incorrect for ideal solution?

  • 3)

    P1 and P2 are the vapour pressures of pure liquid components, 1 and 2 respectively of an ideal binary solution if x1 represents the mole fraction of component 1, the total pressure of the solution formed by 1 and 2 will be

  • 4)

    Which one of the following binary liquid mixtures exhibits positive deviation from Raoults law?

  • 5)

    At 100C the vapour pressure of a solution containing 6.5g a solute in 100g water is 732mm. If Kb = 0.52, the boiling point of this solution will be

11th Chemistry Unit 8 Physical and Chemical Equilibrium Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    If Kb and Kf for a reversible reactions are 0.8 ×10–5 and 1.6 × 10–4 respectively, the value of the equilibrium constant is,

  • 2)

    Solubility of carbon dioxide gas in cold water can be increased by

  • 3)

    In the equilibrium,
    2A(g) ⇌ 2B(g) + C2(g)
    the equilibrium concentrations of A, B and C2 at 400 K are 1 × 10–4 M, 2.0 × 10–3 M, 1.5 × 10–4 M respectively. The value of KC for the equilibrium at 400 K is

  • 4)

    An equilibrium constant of 3.2 × 10–6 for a reaction means, the equilibrium is

  • 5)

    In which of the following equilibrium, KP and KC are not equal?

11th Standard Chemistry - Thermodynamics Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The amount of heat exchanged with surrounding at constant temperature pressure is given by the quantity

  • 2)

    In an adiabatic process, which of the following is true?

  • 3)

    An ideal gas expands from the volume of 1 x 10-3 m3 to 1 x 10-2 m3 at 300 K against a constant pressure at 1 x 105 Nm-2. The work done is

  • 4)

    The heat of formation of CO and CO2 are - 26.4 kcal and - 94 kcal, respectively. Heat of combustion of carbon monoxide will be

  • 5)

    The enthalpies of formation of Al2O3 and Cr2Oare -1596 kJ and -1134 kJ, respectively. ΔH for the reaction 2AI + Cr2O3 ⟶ 2Cr + Al2O3 is

11th Standard Chemistry - Gaseous State Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Gases deviate from ideal behavior at high pressure. Which of the following statement(s) is correct for non-ideality?

  • 2)

    The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called

  • 3)

    The value of the gas constant R is

  • 4)

    Compressibility factor for CO2 at 400 K and 71.0 bar is 0.8697. The molar volume of CO2 under these conditions is

  • 5)

    The variation of volume V, with temperature T, keeping pressure constant is called the coefficient of thermal expansion ie \(\alpha =\frac { 1 }{ V } { \left( \frac { \partial V }{ \partial T } \right) }_{ P }\) . For an ideal gas a is equal to

11th Standard Chemistry - Alkali and Alkaline Earth Metals Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    For alkali metals, which one of the following trends is incorrect?

  • 2)

    RbO2 is

  • 3)

    Lithium shows diagonal relationship with

  • 4)

    In which process, fused sodium hydroxide is electro lysed for extraction of sodium

  • 5)

    The product obtained as a result of a reaction of nitrogen with CaC2 is

11th Standard Chemistry - Periodic Classification Of Elements Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    What would be the IUPAC name for an element with atomic number 222?

  • 2)

    Which of the following elements will have the highest electro negativity

  • 3)

    In the third period the first ionization potential is of the order.

  • 4)

    Which one of the following arrangements represent the correct order of least negative to most negative electron gain enthalpy

  • 5)

    The correct order of electron gain enthalpy with negative sign of F, Cl, Br and I having atomic number 9, 17, 35 and 53 respectively is

11th Standard Chemistry - Hydrogen Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    Which of the following statements about hydrogen is incorrect?

  • 2)

    Tritium nucleus contains

  • 3)

    The hardness of water can be determined by volumetrically using the reagent

  • 4)

    Zeolite used to soften hardness of water is hydrated

  • 5)

    For decolorisation of 1 mole of acidified KMnO4, the moles of H2O2 required is

11th Standard Chemistry - Quantum Mechanical Model of Atom Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The energies E1and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie \(\lambda \)1 and\(\lambda \)2 will be

  • 2)

    Two electrons occupying the same orbital are distinguished by

  • 3)

    For d-electron, the orbital angular momentum is

  • 4)

    What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? n = 3, I = 1 and m =-1

  • 5)

    If n = 6, the correct sequence for filling of electrons will be,

11th Chemistry Unit 1 Basic Concepts of Chemistry and Chemical Calculations Book Back Questions - by Uma - Nagapattinam - View & Read

  • 1)

    The mass of a gas that occupies a volume of 612.5 ml at room temperature and pressure (250 c and 1 atm pressure) is 1.1g. The molar mass of the gas is

  • 2)

    Which of the following compound(s) has /have a percentage of carbon same as that in ethylene (C2H4)

  • 3)

    Which of the following is/are true with respect to carbon -12

  • 4)

    Which one of the following is used as a standard for atomic mass.

  • 5)

    The equivalent mass of potassium permanganate in alkaline medium is:
    MnO4- + 2H2O + 3e-\(\rightarrow\) MnO2 + 4OH-

11th Standard Chemistry - Physical and Chemical Equilibrium One Mark Question and Answer - by Uma - Nagapattinam - View & Read

  • 1)

    If Kb and Kf for a reversible reactions are 0.8 ×10–5 and 1.6 × 10–4 respectively, the value of the equilibrium constant is,

  • 2)

    The equilibrium constant for a reaction at room temperature is K1 and that at 700 K is K2. If K1 > K2, then

  • 3)

    Solubility of carbon dioxide gas in cold water can be increased by

  • 4)

    For which of the following reaction, the degree 0 dissociation (a) and equilibrium constant (Kp) are related as \({ K }_{ p }=\cfrac { 4\alpha ^{ 2 }P }{ \left( 1-{ \alpha }^{ }2 \right) } ?\)

  • 5)

    In which of the following does the reaction go almost to completion?

11th Standard Chemistry - Solutions One Mark Question with Answer Key - by Uma - Nagapattinam - View & Read

  • 1)

    The molality of a solution containing 1.8g of glucose dissolved in 250g of water is

  • 2)

    Which of the following concentration terms is/are independent of temperature

  • 3)

    The Henry's law constant for the solubility of Nitrogen gas in water at 350 K is 8 × 104 atm. The mole fraction of nitrogen in air is 0.5. The number of moles of Nitrogen from air dissolved in 10 moles of water at 350K and 4 atm pressure is

  • 4)

    Which one of the following is incorrect for ideal solution?

  • 5)

    The blocking of capillaires due to sudden release of bubbles of N2 gas in blood is known as

11th Standard Chemistry - Thermodynamics One Mark Question with Answer - by Uma - Nagapattinam - View & Read

  • 1)

    The amount of heat exchanged with surrounding at constant temperature pressure is given by the quantity

  • 2)

    All the naturally occurring processes proceed spontaneously in a direction which leads to

  • 3)

    In an adiabatic process, which of the following is true?

  • 4)

    All naturally occurring processes are ----- process

  • 5)

    The process in which no heat can flow into or out of the system are called ----- process.

11th Chemistry Chapter 6 Gaseous State One Mark Question with Answer Key - by Uma - Nagapattinam - View & Read

  • 1)

    Gases deviate from ideal behavior at high pressure. Which of the following statement(s) is correct for non-ideality?

  • 2)

    Which of the following is the correct expression for the equation of state of van der Waals gas?

  • 3)

    The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called

  • 4)

    A bottle of ammonia and a bottle of HCI connected through a long tube are opened simultaneously at both ends. The white ammonium chloride ring first formed will be

  • 5)

    At identical temperature and pressure, the rate of diffusion of hydrogen gas is 3\(\sqrt { 3 } \) times that of a hydrocarbon having molecular formula CnH2n-2. What is the value of n ?

11th Chemistry Unit 5 Alkali and Alkaline Earth Metals One Mark Question and Answer - by Uma - Nagapattinam - View & Read

  • 1)

    For alkali metals, which one of the following trends is incorrect?

  • 2)

    Which of the following statements is in correct?

  • 3)

    Which of the following compounds will not evolve H2 gas on reaction with alkali metals?

  • 4)

    The radioactive element of group 1 is ______

  • 5)

    Half life of francium is _______

11th Chemistry Chapter 4 Hydrogen One Mark Question with Answer - by Uma - Nagapattinam - View & Read

  • 1)

    Water gas is

  • 2)

    Tritium nucleus contains

  • 3)

    Non-stoichiometric hydrides are formed by

  • 4)

    If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be

  • 5)

    The hardness of water can be determined by volumetrically using the reagent

11th Standard Chemistry Periodic Classification Of Elements - One Mark Question with Answer - by Uma - Nagapattinam - View & Read

  • 1)

    What would be the IUPAC name for an element with atomic number 222?

  • 2)

    The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called

  • 3)

    Period of an element is represented by _____ quantum number

  • 4)

    The first list of 23 chemical elements was published by _____ in the year 1789.

  • 5)

    Law of triad was unable to explain for the element

11th Business Maths - Quantum Mechanical Model of Atom One Mark Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    The energy of light of wavelength 45 nm is

  • 2)

    The energies E1and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie \(\lambda \)1 and\(\lambda \)2 will be

  • 3)

    Splitting of spectral lines in an electric field is called

  • 4)

    The electronic configuration of Eu (Atomic no. 63) Gd (Atomic no. 64) and Tb (Atomic no. 65) are

  • 5)

    Which of the following pairs of d-orbitals will have electron density along the axes ?

11th Chemistry Basic Concepts of Chemistry and Chemical Calculations One Mark Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left. after cooling to room temperature is

  • 2)

    The number of water molecules in a drop of water weighing 0.018 g is

  • 3)

    Fe2 + \(\longrightarrow\) Fe3+ + e- is a ________ reaction.

  • 4)

    The oxidation number of hydrogen in LiH is _____________

  • 5)

    Which one of the following represents 180g of water?

11th Chemistry Thermodynamics Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    All the naturally occurring processes proceed spontaneously in a direction which leads to

  • 2)

    Heat of combustion is always

  • 3)

    Change in internal energy, when 4 kJ of work is done on the system and 1 kJ of heat is given out by the system is

  • 4)

    The bond dissociation energy of methane and ethane are 360 kJ mol-1 and 620 kJ mol-1 respectively. Then, the bond dissociation energy of C-C bond is

  • 5)

    Which among the following is not an extensive property?

11th Chemistry Unit 6 Alkali and Alkaline Earth Metals Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Which of the following compounds will not evolve H2 gas on reaction with alkali metals?

  • 2)

    Lithium shows diagonal relationship with

  • 3)

    Which is the correct sequence of solubility of  carbonates of alkaline earth metals?

  • 4)

    The hydration enthalpies of alkali metal ions decreases in ______ order.

  • 5)

    The reducing power of a metal depends on various factors. Suggest the factor. which makes Li, the strongest reducing agent in aqueous solution

11th Chemistry Unit 6 Gaseous State Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Rate of diffusion of a gas is

  • 2)

    The value of universal gas constant depends upon

  • 3)

    Compressibility factor for CO2 at 400 K and 71.0 bar is 0.8697. The molar volume of CO2 under these conditions is

  • 4)

    Pressure is _____________

  • 5)

    The hydrogen balloon was invented by ______________

11th Chemistry First Mid Term Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left. after cooling to room temperature is

  • 2)

    Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidising behaviour?

  • 3)

    Which of the following compound(s) has /have a percentage of carbon same as that in ethylene (C2H4)

  • 4)

    Molecular mass =

  • 5)

    Assertion: Helium has the highest value of ionization energy among all the elements known
    Reason: Helium has the highest value of electron affinity among all the elements known

11th Chemistry Chapter 4 Hydrogen Model Question Paper - by Uma - Nagapattinam - View & Read

  • 1)

    Which of the following statements about hydrogen is incorrect?

  • 2)

    Non-stoichiometric hydrides are formed by

  • 3)

    If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be

  • 4)

    The number of neutrons in  hydrogen atom is ___________.

  • 5)

    _____________ is known as heavy hydrogen.

View all

TN Stateboard Education Study Materials

TN Stateboard Updated Class 11th Chemistry Syllabus

Basic Concepts of Chemistry and Chemical Calculations

Chemistry-The Centre of Life-Classification of Matter-Atomic and Molecular Masses-Mole Concept-Gram Equivalent Concept-Empirical Formula and Molecular Formula-Stoichiometry-Redox Reactions

Quantum Mechanical Model of Atom

Introduction to Atom Models-Wave Particle Duality of Matter-Heisenberg’s Uncertainty Principle-Quantum Mechanical Model of Atom – Schrodinger Equation-Quantum Numbers-Filling of Orbitals

Periodic Classification of Elements

Introduction-Classification of Elements-Moseley's Work and Modern Periodic Law-Nomenclature of Elements with Atomic Number Greater Than 100-Grouping of Elements Based on Electronic Configurations-Periodic Trends in Properties-Periodic Trends in Chemical Properties

Hydrogen

Introduction-Preparation of Hydrogen-Properties of Hydrogen-Uses of Hydrogen-Compounds of Hydrogen-Heavy Water-Hydrogen Peroxide-Hydrides-Hydrogen Bonding

Alkali and Alkaline Earth Metals

s-block Elements-Alkali Metals-General Characteristics of the Compounds of Alkali Metals-Biological Importance of Sodium and Potassium-Alkaline Earth Metals-General Characteristics of the Compounds of the Alkaline Earth Metals-Biological Importance of Magnesium and Calcium

Gaseous State

Introduction-The Gas Laws-Ideal Gas Equation-Mixture of Gases-Dalton’s Law of Partial Pressures-Deviation from Ideal Gas Behaviour-Pressure-Volume Isotherms of Carbon Dioxide-Liquefaction of Gases

Thermodynamics

Introduction-System and Surrounding-Zeroth Law of Thermodynamics-First Law of Thermodynamics-Enthalpy (H)-Thermochemical Equations-Measurement of ΔU and ΔH Using Calorimetry-Hess’s Law of Constant Heat Summation-Lattice Energy (ΔHlattice)-Second Law of Thermodynamics-Gibbs Free Energy (G)-Third Law of Thermodynamics

TN StateboardStudy Material - Sample Question Papers with Solutions for Class 11 Session 2019 - 2020

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