JEE Advanced Exam 2013 Paper-II Chemistry Question Paper With Answer Key

PART II : CHEMISTRY

SECTION 1 : (One or more options correct Type)

This section contains 8 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONE or MORE are correct.

1. The carbon-based reduction method is NOT used for the extraction of

(A)  tin from SnO2

(B)  iron from Fe2O3

(C)  aluminium from Al2O3

(D)  magnesium from MgCO3 . CaCO3

Answer: (C, D)

2. The thermal dissociation equilibrium of CaCO3(s) is studied under different conditions.

CaCO3 (s) ⇌ CaO(s) + CO2 (g)

For this equilibrium, the correct statement(s) is (are)

(A)  ΔH is dependent on T

(B)  K is independent of the initial amount of CaCO3

(C)  K is dependent on the pressure of CO2 at a given T

(D)  ΔH is independent of the catalyst, if any

Answer: (A, B, D)

3. The correct statement(s) about O3 is(are)

(A)  O−O bond lengths are equal

(B)  Thermal decomposition of O3 is endothermic

(C)  O3 is diamagnetic in nature

(D)  O3 has a bent structure

Answer: (A, C, D)

4. In the nuclear transmutation

(X, Y) is (are)

(A)  (γ, n)

(B)  (p, D)

(C)  (n, D)

(D)  (γ, p)

Answer: (A, B)

5. The major product (s) of the following reaction is(are)

(A)  P

(B)  Q

(C)  R

(D)  S

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Answer: (B)

6. After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are)

(A)  Reaction I : P and Reaction II : P

(B)  Reaction I : U, acetone and Reaction II : Q, acetone

(C)  Reaction I : T, U, acetone and Reaction II : P

(D)  Reaction I : R, acetone and Reaction II : S, acetone

Answer: (C)

7. The Ksp of Ag2CrO4 is 1.1 × 1012 at 298 J. The solubility (in mol/L) of Ag2CrO4 in a 0.1 M AgNO3 solution is

(A)  1.1 × 1011

(B)  1.1 × 1010

(C)  1.1 × 1012

(D)  1.1 × 109

Answer: (B)

8. In the following reaction, the product(s) formed is (are) 

(A)  P (major)

(B)  Q(minor)

(C)  R (minor)

(D)  S (major)

Answer: (B, D)

SECTION 2 : (Paragraph Type)

This section contains 4 paragraphs each describing theory, experiment, data etc. Eight questions relate to four paragraphs with two questions on each paragraph. Each question of a paragraph has only one correct answer among the four choices (A), (B), (C) and (D)..

Using the following Paragraph , Solve Q. No. 9 and 10

An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate P was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H2S in a dilute mineral acid medium. However, it gave a  precipitate (R) with H2S in an ammoniacal medium. The precipitate R gave a coloured solution (S), when treated with H2O2 in an aqueous NaOH medium.

9. The precipitate P contains

(A)  Pb2+

(B)   

(C)  Ag+

(D)  Hg2+

Answer: (A)

10. The coloured solution S contains

(A)  Fe2(SO4)3

(B)  CuSO4

(C)  ZnSO4

(D)  Na2CrO4

Answer: (D)

Using the following Paragraph , Solve Q. No. 11 and 12

P and Q are isomers of dicarboxylic acid C4H4O4. Both decolorize Br2 / H2O. On heating , P forms the cyclic anhydride.

Upon treatment with dilute alkaline KMnO4 , P as well as Q could produce one or more than one from S, T and U.

11. Compounds formed from P and Q are , respectively

(A)  Optically active S and optically active pair (T, U)

(B)  Optically inactive S and optically inactive pair (T, U)

(C)  Optically active pair (T, U) and optically active S

(D)  Optically inactive pair (T, U) and optically inactive S.

Answer: (B)

12. In the following reaction sequences V and W are , respectively

(A) 

(B)  

(C) 

(D) 

Answer: (A)

Using the following Paragraph , Solve Q. No. 13 and 14

A fixed mass ‘m’ of a gas is subjected to transformation of states from K to L to M to N and back to K as shown in the figure

13. The succeeding operations that enable this transformation of states are

(A)  Heating, cooling, heating , cooling

(B)  Cooling , heating cooling, heating

(C)  Heating, cooling, cooling, heating

(D)  Cooling, heating, heating, cooling

Answer: (C)

14. The pair of isochoric processes among the transformation of states is

(A)  K to L and L to M

(B)  L to M and N to K

(C)  L to M and M to N

(D)  M to N and N to K

Answer: (B)

Using the following Paragraph , Solve Q. No. 15 and 16

The reactions of Cl2 gas with cold − dilute and hot − concentrated NaOH in water give sodium salts of two (different) oxoacids of chlorine, P and Q respectively. The Cl2 gas reacts with SO2 gas , in presence of charcoal, to give a product R. R reacts with white phosphorus to give a compound S. On hydrolysis, S gives an oxoacid of phosphorus , T.

15. P and Q respectively, are the sodium salts of

(A)  hypochlorus and chloric acids

(B)  hypoclorus and chlorus acids

(C)  chloric and perchloric acids

(D)  chloric and hypochlorus acids

Answer: (A)

16. R, S and T , respectively are

(A)  SO2Cl2, PCl5 and H3PO4

(B)  SO2Cl2, PCl3 and H3PO3

(C)  SOCl2, PCl3 and H3PO2

(D)  SOCl2, PCl5 and H3PO4

Answer: (A)

SECTION 3 : (Matching List Type)

This section contains 4 multiple choice questions. Each question has matching lists. The codes for the lists have choices (A), (B), (C) and (D) out of which ONLY ONE is correct

17. An aqueous solution of X is added slowly to an aqueous solution of Y as shown in List I. The variation in conductivity of these reactions is given in List II. Match List I with List II and select the correct answer using the code given below the lists :

(A)  P – 3 ; Q – 4 ; R – 2 ; S – 1

(B)  P – 4 ; Q – 3 ; R – 2 ; S – 1

(C)  P – 2 ; Q – 3 ; R – 4 ; S – 1

(D)  P – 1 ; Q – 4 ; R – 3 ; S – 2

Answer: (A)

18. The standard reduction potential data at 25° C is given below.

E° (Fe3+, Fe2+) = + 0.77 V;

E° (Fe2+, Fe) = − 0.44 V

E° (Cu2+, Cu) = + 0.34 V

E° (Cu+, Cu) = + 0.52 V

E° [O2(g) + 4H+ + 4e → 2H2O] = + 1.23 V;

E° [O2(g) + 2H2O + 4e → 4OH] = + 0.40 V

E° (Cr3+, Cr) = −0.74 V;

E° (Cr2+, Cr) = −0.91 V

Match E° of the redox pair in List I with the values given in List II and select the correct answer using the code given below the lists :

(A)  P – 4 ; Q – 1 ; R – 2 ; S – 3

(B)  P – 2 ; Q – 3 ; R – 4 ; S – 1

(C)  P – 1 ; Q – 2 ; R – 3 ; S – 4

(D)  P – 3 ; Q – 4 ; R – 1 ; S – 2

Answer: (D)

19. The unbalanced chemical reactions given in List I show missing reagent or condition (?) which are provided in List II. Match List I with List II and select the correct answer using the code given below the lists :

(A)  P – 4 ; Q – 2 ; R – 3 ; S – 1

(B)  P – 3 ; Q – 2 ; R – 1 ; S – 4

(C)  P – 1 ; Q – 4 ; R – 2 ; S – 3

(D)  P – 3 ; Q – 4 ; R – 2 ; S – 1

Answer: (D)

20. Match the chemical conversions in List I with the appropriate reagents in List II and select the correct answer using the code given below the lists :

(A)  P – 2 ; Q – 3 ; R – 1 ; S – 4

(B)  P – 3 ; Q – 2 ; R – 1 ; S – 4

(C)  P – 2 ; Q – 3 ; R – 4 ; S – 1

(D)  P – 3 ; Q – 2 ; R – 4 ; S – 1

Answer: (A)

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