12th Standard CBSE Chemistry Study material & Free Online Practice Tests - View and download Sample Question Papers with Solutions for Class 12 Session 2019 - 2020 CBSE

Chemistry Question Papers & Study Material

12th CBSE Chemistry Alcohols, Phenols, and Ethers Model Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    The general molecular foemula which represents the homologous series of alkanols is

  • 2)

    The relative ease of dehydration of alcohols follows the following order :

  • 3)

    CH3OC2H5 and (CH3)3 COCH3 are treated with hydriodic acid. The fragments after reactions obtaind are:

  • 4)

    Among the alkenes which one produces tertiary butyl alcohol on hydration?

  • 5)

    In the following sequence of reactions, CH3-Br \(\overset{KCN}\longrightarrow\) A \(\overset{H_3O^+}\longrightarrow\)\(\overset { LiAlH_{ 4 } }{ \underset { ether }{ \longrightarrow } } \) C the end product (c) is

12th Standard CBSE Chemistry Haloalkanes and Haloarenes Model Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    The reaction of hydrogen bromide with propene in absence of peroxide is an example of a/an

  • 2)

    Which of the following halogen-exchange reaction will occur?

  • 3)

    Which of the following compounds has the highest boiling point?

  • 4)

    Which one of the following forms propanenitrile as the major product?

  • 5)

    The intermidiate during the addition of HCI to propane in presence of peroxide is

12th Standard CBSE Chemistry Coordination Compounds Model Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    Which one of the following is a tridentate ligand? 

  • 2)

    IUPAC  name of [Pt(NH3)3Br(NO2)Cl]Cl is 

  • 3)

    Amongst the following ions which one has the highest paramagnetism? 

  • 4)

    The most stable complex among the following is 

  • 5)

    When 0.01 mole of a cobalt complex is treated with excess silver nitrate solution, 4.305 g silver chloride is precipitated. The formula of the complex is

12th Standard CBSE Chemistry The d- and f- Block Elements Model Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    Irregular trend in the standard reduction potential value of the first row transition elements is due to

  • 2)

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

  • 3)

    Which of the following statement about transition elements is incorrect ?

  • 4)

    KMnO4, oxidation number of Mn is

  • 5)

    Name a member of lanthanide series which is well known to exhibit + 4 oxidation state :

12th Standard CBSE Chemistry Unit 7 The p-Block Elements Model Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    Which of the following does not form a pentachloride?

  • 2)

    The element which forms oxides in all oxidation states +I to +V is

  • 3)

    The element evolving two different gases on reaction with cone. Sulphuric acid is

  • 4)

    Which of the following compounds exists?

  • 5)

    Strong reducing behaviour of H3PO2 is due to

12th CBSE Chemistry Unit 6 General Principles and Processes of Isolation of Elements Sample Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    Which one of the following is most abundant in earth crust?

  • 2)

    The metal always found in free state is

  • 3)

    Which of the following benefaction processes is used for the mineral,Al2O3.2H2O?

  • 4)

    Heating pyrites to remove sulphur is called

  • 5)

    Which step is not correct for refining of crude metals?

12th Standard CBSE Chemistry Surface Chemistry Model Questions Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    Which of the following is true in respect of adsorption?

  • 2)

    Which one of the following forms an intrinsic colloid?

  • 3)

    Which of the following electrolytes will be most effective in the coagulation of gold sol?

  • 4)

    The correct ascending order of adsorption of the following gases on the same mass of charcoal at the same mass of charcoal at the same temperature and pressure is

  • 5)

    Which of the following relation is correct ?

    (i) x/m = constant at high pressure

    (ii) x/m = constant xp1/n (at intermediate pressure)

    (iii) x/m = constant xpn (at lower pressure)

12th CBSE Chemistry Unit 4 Chemical Kinetics Important Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    In the reaction BrO-3 (aq) + 5 Br - (aq) + 6 H+ \(\longrightarrow\) 3 Br2(I) + 3 H2O (l), the rate of apperance of bromine (BHr2) is related to the disapearance of bromide uions as follows :

  • 2)

     The rate of  the reaction 2 NO + CI2 \(\rightarrow\) 2NOCI is given by the rate equation : rate = k [NO]2 [CI2]. The value  of the rate constant can be increased by

  • 3)

    The molecularity and order of the reaction 2 NO (g) + O2 (g) \(\rightarrow\)2NO2 (g) are respectively

  • 4)

    Consider the reaction : CI2 (aq) + H2S (aq) \(\rightarrow\) S (s) + 2 H+ (aq) +2 CI- (aq) The rate equation for this reaction is rate k [CI2] [H2S] Which of these mechanisms is / are consistant with this rate equation ?

    A. CI2+H2\(\longrightarrow\) H+ + CI- + CI+ HS- (slow) ; CI+ Hs-  \(\longrightarrow\) H+ + CI- + S (fast)

    B. H2\(\rightleftharpoons \) H+ + HS - (fast equilibrium) ; CI2 + HS-  \(\longrightarrow\) 2 CI- + H+ S (slow)

  • 5)

    For the reaction R \(\longrightarrow\) P, a graph of [R] against time is found to be a straight line with negative slope. What is the order of reaction ?

12th Standard CBSE Chemistry Unit 3 Electrochemistry Important Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    A dilute aqueous solution of Na2 SO4 is electrolysed using platinum electrodes. The products at the anode and cathode are

  • 2)

    The time required to liberate one gram equivalent of an element by passing one ampere current through its solution is

  • 3)

    Which of the following solution has highest equivalent conductance ?

  • 4)

    Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al2 (SO4)3 . Given that \({ \lambda }^{ ° }_{ Al^{ 3+ } }\) and \({ \lambda }^{ ° }_{ { SO_{ 4 } }^{ 2- } }\) are the equivalent conductances at infinite dilution of the respective ions ?

  • 5)

    Unit of ionic mobility is

12th Standard CBSE Chemistry Unit 2 Solution Important Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    Brass is 

  • 2)

    200 mL of water is added to 500mL of 0.2 M solution. What is the molarity of the dilluted solution ?

  • 3)

    5ml of 1 N HCI, 20ml of N/2 H2SO4 and 30ml of N/3 HNO3 are mixed together and the volume made to one litre. The normality of the resulting solution is

  • 4)

    Which one of the following gases has the lowest value of the Henry's law constant ?

  • 5)

    An aqueous solution of methanol in water has vapour pressure

12th CBSE Chemistry Unit 1 The Solid State Important Question Paper - by Archana Singh - Deoghar - View & Download

  • 1)

    The property of crystalline solid is not

  • 2)

    Wax is an example of

  • 3)

    Which one of the following is a molecular crystal ?

  • 4)

    In a tetragonal crystal

  • 5)

    An example of a face centered cubic lattice is

Class 12 CBSE Chemistry Half Yearly Model Question Paper - by Bala - View & Download

  • 1)

    How the supersonic jet aeroplanes are responsible for the depletion of ozone layer ?

  • 2)

    The chemistry of actinoids is not so smooth as that of lanthanoids. Give reason.

  • 3)

    The well known refrigerant freon has the structure .........

  • 4)

    Write the IUPAC name of the following:

  • 5)

    Write the products of hydrolysis of maltose?

12th Standard CBSE Chemistry Important HOTs Problems - by Bala - View & Download

  • 1)

    A 5 percent solution (by mass) of cane-sugar (M.W. 342) is isotonic with 0.877% solution of substance X. Find the molecular weight of X.

  • 2)

    White phosphorus reacts with chlorine and the product hydrolyses in the presence of water.  Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62g of white phosphorus with chlorine in the presence of water.

  • 3)

    Give the structure of the following compounds.

    (i) 4-Nitropropiophenone

    (ii) 2-Hydroxycyclopentanecarbaldehyde

    (iii) Phenyl acetaldehyde

  • 4)

    An aromatic compound 'A' (Molecular formula C8H8O) gives positive 2, 4-DNP test.  It gives a yellow precipitates of compound 'B' on treatments with iodine and sodium hydroxide solution.  Compound 'A' does not give Tollen's or Fehling's test.  On drastic oxidation with potassium permanganate it forms a carboxylic acid 'C' (Molecular formula C7HO)6O2),  which is also formed along with the yellow compound in the above reaction.  Identify A, B and C write all the reacitons involved.

  • 5)

    A hydrocarbon 'A' (C4H8) on reaction with HCI gives a compound 'B' , (C4H11N). On reacting with NaNO2 and HCI followed by treatment with water, compound 'C'. Ozonolysis of 'A' gives 2 moles of acetaldehyde. Identify compounds 'A' to 'D' . Explain the reactions involved.

Class 12 Model Question - by Bala - View & Download

  • 1)

    Why is glass considered as supercooled liquid?

  • 2)

    What is the coordination number in a rock salt type structure?

  • 3)

    What is meant by 'doping' in a semiconductor?

  • 4)

    Red blood cells (RBC) are isotonic with .............. % NaCI solution.

  • 5)

    KCl, KNO3 etc. are preferred in a salt bridge because they have equal --------------

12th CBSE Chemistry Organic Compounds Containing Nitrogen Important Questions - by Bala - View & Download

  • 1)

    Which of the following reactions will not give a primary amine?

  • 2)

    When a primary amine reacts with chloroform and ethanolic KOH, then the product formed is

  • 3)

    Which of the following will not show coupling reaction with benzenediazonium chloride?

  • 4)

    Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?

  • 5)

    The best reagent for converting, 2-phenylpropanamide into 1-phenylethanamine is.................................. .

12th CBSE Chemistry Biomolecules Important Question Paper - by Bala - View & Download

  • 1)

    Which of the following is incorrect for glucose?

  • 2)

    When glucose is treated with excess of phenylhydrazine in acetic acid, the product is 

  • 3)

    Which of the following disaccharide gives a ketose and an aldose only on hydrolysis?

  • 4)

    The helical structure of protein is stabilized by 

  • 5)

    Which sugar is present in DNA ?

12th Chemistry Polymers Important Question Paper - by Bala - View & Download

  • 1)

    Rayon is  a

  • 2)

    Which of the following is not a thermoplastic?

  • 3)

    Which of the following polymers can be used for lubrication and as an insulator?

  • 4)

    Which polymers occur naturally?

  • 5)

    Which of the following are addition homopolymers?

12th CBSE Chemistry in Everyday Life Important Questions - by Bala - View & Download

  • 1)

    Which of the following antacids is an antihistamine ?

  • 2)

    Which of the following is not a surfactant ?

  • 3)

    Which statement about aspirin is not true ?

  • 4)

    Equanil is ............ .

  • 5)

    Compounds with antiseptic properties are ....... .

12th Standard Chemistry Revision Model Question Paper 1 - by Bala - View & Download

  • 1)

    Conductivity of silicon increases on doping it with phosphorus.

  • 2)

    In an electrochemical cell, the conventional current flows from -------- to  ----------------

  • 3)

    Why is the ester hydrolysis slow in the beginning  and becomes faster after sometime?

  • 4)

    How will you convert bromobenzene to I-phenylethanol?

  • 5)

    Arrange the following in increasing order of basic strength: Aniline, p-Nitroaniline and p-Toluidine

Class 12 CBSE Chemistry Revision Test Question Paper - by Bala - View & Download

  • 1)

    In which mode of expression, the concentration of solution remains independent of temperature ?

  • 2)

    Increasing the temperature of an aqueous solution will cause

  • 3)

    What is the osmotic pressure of a 0.0020 mol dm-3 sucrose (C12H22O11) solution at 20oC ? (Molar gas constant, R = 8.314 JK-1mol-1)

  • 4)

    Camphor is often used in molecular mass determination because

  • 5)

    Low concentration of oxygen in the blood and tissues of people living at high altitude is due to ........... .

12th Standard CBSE Chemistry Term 2 Model Question Paper - by Bala - View & Download

  • 1)

    Which of the following on heating does not give nitrogen gas?

  • 2)

    The element which forms oxides in all oxidation states +I to +V is

  • 3)

    Which of the following compounds exists?

  • 4)

    The formation of O2+[PtF6]is the basis for the formation of xenon fluorides. This is because

  • 5)

    The orange solid on heating gives a colourless gas and a green solid which cab be reduced to metal by aluminum powder.  The orange and the green solids are, respectively,

Class 12 CBSE Chemistry Term 1 Model Question Paper - by Bala - View & Download

  • 1)

    Wax is an example of

  • 2)

    The arrangement of X- ions around Aions in solid AX is given in the fig(not drawn to scale).If the radius of X- is 250pm,the radius of A+ is

  • 3)

    In an ionic compound A+X-,the radii of A+ and X- ions are 1.0pm and 2.0pm respectively.The volume of the unit cell of the crystal AX will be

  • 4)

    A solid compound XY has NaCl structure.If the radius of the cation is 100pm,the radius of the anion(Y-) will be

  • 5)

    A metal crystallize with a face-centred cubic lattice.The edge of the unit cell is 408pm.The diameter of the metal atom is

Solution - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    Molarity of the liquid HCL if density of the solution is 1.17 g/cc is 

  • 2)

    5ml of 1 N HCI, 20ml of N/2 H2SO4 and 30ml of N/3 HNO3 are mixed together and the volume made to one litre. The normality of the resulting solution is

  • 3)

    Which one of the following gases has the lowest value of the Henry's law constant ?

  • 4)

    The system that forms maximum boiling azeotrope is

  • 5)

    The molal freezing point constant of water is 1.86o C/M. Therefore the freezing point of 0.1 M NaCl solution in water is expected to be

12th Chemistry Model Question Paper 5 - by Bala - View & Download

  • 1)

    Which of the following antacids is an antihistamine ?

  • 2)

    Aspirin is an

  • 3)

    Which of the following is used as a preservative to protect processed food ?

  • 4)

    Which of the following statements is not correct ?

  • 5)

    The most useful classification of drugs for medicinal chemists is .......... .

Polymers - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    Which of the following is a linear polymer?

  • 2)

    Which of the following is a step-growth polymer?

  • 3)

    Bakelite is a polymer of

  • 4)

    Which of the following is not a semisynthetic polymer?

    cis-Polyisoprene Cellulose nitrate Cellulose acetate Vulcanised rubber

  • 5)

    Which of the following are characteristics of thermosetting polymers?

Organic Compounds Containing Nitrogen ( Amines ) - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    Nitration of nitrobonzene results in..............

  • 2)

    \({ CH }_{ 3 }{ CH }_{ 2 }\overset { Aq.KOH }{ \underset { \triangle }{ \longrightarrow } } A\overset { KMnO_{ 4 }\quad /\quad { H }^{ + } }{ \underset { \triangle }{ \longrightarrow } } B\overset { N{ H }_{ 3 } }{ \underset { \triangle }{ \longrightarrow } } C\overset { B{ r }_{ 2 } }{ \underset { Alkali }{ \longrightarrow } } D;D\quad is\)

  • 3)

    Which of the following compounds gives dye test?

  • 4)

    Amongst the following, the strongest base in aqueous medium is........................

  • 5)

    Reduction of aromatic nitro compounds using Fe and HCI gives............................ .

Alcohols , Phenols And Ethers - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    Which of the following will produce only one product on reduction with LiAIH4?

  • 2)

    The relative ease of dehydration of alcohols follows the following order :

  • 3)

    CH3OC2H5 and (CH3)3 COCH3 are treated with hydriodic acid. The fragments after reactions obtaind are:

  • 4)

    What is the correct order of reactivity of alcohols in the following reaction?

    \(R-OH+HCI\overset { ZnCl_{ 2 } }{ \longrightarrow } R-Cl+{ H }_{ 2 }O\)

  • 5)

    Acid-catalysed hydration of alkenes except ethane leads to the formation of

Haloalkanes And Haloarenes - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    The reaction of hydrogen bromide with propene in absence of peroxide is an example of a/an

  • 2)

    Which of the following are arranged in the decreasing order of dipole moment?

  • 3)

    Which of the following events does not occur during SN2 reaction mechanism?

  • 4)

    The intermidiate during the addition of HCI to propane in presence of peroxide is

  • 5)

    The order of rate of hydrolysis of alkyl halides Io, 2o, 3o and CH3 X by the SN2 pathway is

Coordination Compounds - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    The number of possible isomers for the complex [Co(C2O4)2(NH3)2] is 

  • 2)

    The primary and secondary valencies of chromium in the complex ion, dichlorodioxalatochromium (III) are respectively

  • 3)

    Prussian blue is obtained by mixing together aqueous solution of Fe3+ salt with 

  • 4)

    Oxidation number and coordination number of silver in Tollen's reagent respectively are

  • 5)

    [Co(NH3)4(NO2)2]Cl exhibits

12th Chemistry Model Question Paper 3 - by Bala - View & Download

  • 1)

    Which of the following is not a transition element ?

  • 2)

    Which element does not show variable oxidation state ?

  • 3)

    Which metal has highest density ?

  • 4)

    KMnO4, oxidation number of Mn is

  • 5)

    Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5. What is its atomic number ?

Pblock Elements - Important Questions Model Paper In 12th Chemistry - by Bala - View & Download

  • 1)

    Which of the following on heating does not give nitrogen gas?

  • 2)

    Which o the following is not hydrolysed?

  • 3)

    Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

  • 4)

    On addition of conc.H2SO4 to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes comes out. This is because

  • 5)

    Which of the following elements does not show allotropy?

General Principles And Processes Of Isolation Of Elements - Important Questions Model Question Paper 1 In 12th Chemistry - by Bala - View & Download

  • 1)

    The metal always found in free state is

  • 2)

    Which of the following benefaction processes is used for the mineral,Al2O3.2H2O?

  • 3)

    Consider the following reaction at 10000C.

    A.Zn(s)+\(1\over2\)O2(g)\(\longrightarrow\)ZnO(g);\(\Delta\)G0=-360 kJ mol-1

    B.C(gr)+\(1\over2\)O2(g)\(\longrightarrow\)CO(g);\(\Delta\)G0=-460 kJ mol-1

    Choose the correct statement at 10000C

  • 4)

    During smelting,an additional substance is added which combines with impurities to form a fusible mass.The additional substance is called

  • 5)

    The method of zone refining of metals is based on the principle of 

Electrochemistry - Important Questions Model Question Paper 2 In 12th Chemistry - by Bala - View & Download

  • 1)

    The time required to liberate one gram equivalent of an element by passing one ampere current through its solution is

  • 2)

    Unit of ionic mobility is

  • 3)

    A gas X at 1 atm is bubbled through a solution containing a mixture of 1M Y- and 1M Z- ions at 25°C . If the reduction potential of Z > Y > X, then

  • 4)

    What will be the e.m.f of the given cell ? Pt | H2 (P1) | H+ (aq) | H2 (P2) | Pt

  • 5)

    An electrochemical cell can behave like an electrolytic cell when --------

Solution - Important Questions Model Question Paper 2 In 12th Chemistry - by Bala - View & Download

  • 1)

    200 mL of water is added to 500mL of 0.2 M solution. What is the molarity of the dilluted solution ?

  • 2)

    An aqueous solution of methanol in water has vapour pressure

  • 3)

    What is the osmotic pressure of a 0.0020 mol dm-3 sucrose (C12H22O11) solution at 20oC ? (Molar gas constant, R = 8.314 JK-1mol-1)

  • 4)

    If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water \((\Delta { T }_{ f })\), when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is (Kf=1.86 K kg mol-1).

  • 5)

    Which of the following aqueous solutions should have the highest boiling point ?

Chemical Kinetics - Important Questions Model Paper In 12th Chemistry - by Bala - View & Download

  • 1)

    The rate of a gaseous reaction is given by the expression k [A][B]. If the volume of the reaction vessel is suddenly reduced to 1/4 th of the initial volume, the reaction rate relating to original rate will be

  • 2)

    In a reaction \(\longrightarrow\) B, the rate of reaction increases two times on increasing the concentration of the reactant four times, then order of reaction is 

  • 3)

     The rate of  the reaction 2 NO + CI2 \(\rightarrow\) 2NOCI is given by the rate equation : rate = k [NO]2 [CI2]. The value  of the rate constant can be increased by

  • 4)

    The unit of rate constant for a zero order reaction is

  • 5)

    A first order reaction has a half-life period of 34.65 seconds. Its rate constant is 

The Solid State - Important Questions Model Paper In 12th Chemistry - by Bala - View & Download

  • 1)

    The property of crystalline solid is not

  • 2)

    Wax is an example of

  • 3)

    In a tetragonal crystal

  • 4)

    An example of a face centered cubic lattice is

  • 5)

    The number of octahedral sites per sphere in fcc structure is

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P - Block Elements - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

D And F - Block Elements - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Surface Chemistry - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Solution - Important Questions Model Question Paper 3 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Solid State - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Polymers - Important Questions Model Question Paper 2 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Organic Compounds Containing Nitrogen ( Amines ) - Important Questions Model Question Paper 2 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Haloalkanes And Haloarenes - Important Questions Model Question Paper 2 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

General Principles And Processes Of Isolation Of Elements - Important Questions Model Question Paper 2 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Electrochemistry - Important Questions Model Question Paper 1 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Coordination Compounds - Important Questions Model Question Paper 2 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Chemistry In Everyday Life - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Chemical Kinetics - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Biomolecules - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Aldehydes , Ketones And Carboxylic Acids - Important Questions Model Question Paper In 12th Chemistry - by ADMIN-ENGLISH - View & Download

Alcohols , Phenols And Ethers - Important Questions Model Question Paper 2 In 12th Chemistry - by ADMIN-ENGLISH - View & Download

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12th CBSE Chemistry 2019 - 2020 Academic Syllabus Archana Singh - Deoghar

Chemistry 2019 - 2020 Academic Syllabus 

Tips & Tricks to score 70/70 in CBSE Class 12 Chemistry Bala

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CBSEStudy Material - Sample Question Papers with Solutions for Class 12 Session 2019 - 2020

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