JEE Advanced Exam 2009 Paper-II Chemistry Question Paper With Answer Key

Part I : Chemistry

Section-I

Single Correct Choice Type

This section contains 4 multiple choice questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out which ONLY ONE is correct.

1. For a first order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation  w The pre-exponential factor A and the activation energy Ea, respectively, are

(A)   1.0 × 106 s−1 and 9.2 kJmol−1

(B)   6.0 s−1 and 16.6 kJmol−1

(C)   1.0 × 106 s−1 and 16.6 kJmol−1

(D)   1.0 × 106 s−1 and 38.3 kJmol−1

Answer: (D)

2. The spin only magnetic moment value (in Bohr magneton units) of Cr(CO)6 is

(A)   0

(B)   2.84

(C)   4.90

(D)   5.92

Answer: (A)

3. In the following carbocation. H/CH3 that is most likely to migrate to the positively charged carbon is

(A)   CH3 at −4

(B)   H at C-4

(C)   CH3 at C-2

(D)   H at C-2

Answer: (D)

4. The correct stability order of the following resonance structures is

(A)   (I) > (II) > (IV) > (III)

(B)   (I) > (III) > (II) > (IV)

(C)   (II) > (I) > (III) > (IV)

(D)   (III) > (I) > (IV) > (II)

Answer: (B)

SECTION-II

Multiple Correct Choice Type

This section contains 5 multiple choice questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out which ONE OR MORE is/are correct.

5. For the reduction of  ion in an aqueous solution, E0 is +0.96 V. Values of E0 for some metal ions are given below

V2+ (aq) + 2e →V           E0 = −1.19 V

Fe3+ (aq) + 3e →Fe         E0 = −0.04 V

Au3+ (aq) + 3e →Au       E0 = +1.40 V

Hg2+ (aq) + 2e →Hg        E0 = +0.86 V

The pair(s) of metals that is(are) oxidized by  in aqueous solution is(are)

(A)   V and Hg

(B)   Hg and Fe

(C)   Fe and Au

(D)   Fe and V

Answer: (A, B, D)

6. Among the following, the state function(s) is(are)

(A)   Internal energy

(B)   Irreversible expansion work

(C)   Reversible expansion work

(D)   Molar enthalpy

Answer: (A, D)

7. In the reaction

2X + B2H6 → [BH2(X)2]+[BH4]

the amine(s) X is (are)

(A)   NH3

(B)   CH3NH2

(C)   (CH3)2NH

(D)   (CH3)3N

Answer: (A, B, C)

8. The nitrogen oxide(s) that contain(s) N−N bond(s) is(are)

(A)   N2O

(B)   N2O3

(C)   N2O4

(D)   N2O5

Answer: (A, B, C)

9. The correct statement(s) about the following sugars X and Y is(are)

(A)   X is a reducing sugar and Y is a non-reducing sugar

(B)   X is a non-reducing sugar and Y is a reducing sugar

(C)   The glucosidic linkages in X and Y are α and β, respectively

(D)   The glucosidic linkages in X and Y are β and α, respectively

Answer: (A, B, D)

SECTION – III

Matrix – Match Type

This section contains 2 questions. Each question contains statements given in two columns, which have to be matched. The statements in Column I are labelled A, B, C and D, while the statements in Column II are labelled p, q, r, s and t. Any given statement in Column I can have correct matching with ONE OR MORE statement(s) in Column II.

10. Match each of the reactions given in Column I with the corresponding product(s) given in Column II.

(A)   ((A – p, s) (B – q, s) (C – r, t) (D – q, t))

(B)   ((A – r, t) (B – p, t) (C – s, p) (D – r, s))

(C)   ((A – r, p) (B – q, t) (C – s, p) (D – r, p))

(D)   ((A – t, r) (B – p, r) (C – q, p) (D – s, r))

Answer: (A)

11. Match each of the compounds given in Column I with the reaction(s), that they can undergo given in Column II.

(A)   ((A – r, s, q) (B – r, p, q) (C – p, t) (D – r))

(B)   ((A – p, q, t) (B – p, s, t) (C – r, s) (D – p))

(C)   ((A – s, t, r) (B – q, p, r) (C – s, q) (D – t))

(D)   ((A – t, s, q) (B – r, q, p) (C – p, t) (D – s))

Answer: (B)

SECTION – IV

Integer Answer Type

This section contains 8 questions. The answer to each of the questions is a single digit integer, ranging from 0 to 9.

12. In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess oxygen at 298.0 K. The temperature of the calorimeter was found to increase from 298.0 K to 298.45 K due to the combustion process. Given that the heat capacity of the calorimeter is 2.5 kJ K−1, the numerical value for the enthalpy of combustion of the gas in kJmol−1 is

Answer: (9)

13. At 400 K, the root mean square (rms) speed of a gas X (molecular weight = 40) is equal to the most probable speed of gas Y at 60 K. The molecular weight of the gas Y is

Answer: (4)

14. The dissociation constant of a substituted benzoic acid at 25oC is 1.0 × 10−4. The pH of a 0.01 M solution of its sodium salt is

Answer: (8)

15. The total number of α and β particles emitted in the nuclear reaction  is

Answer: (8)

16. The oxidation number of Mn in the product of alkaline oxidative fusion of MnO2 is

Answer: (6)

17. The number of water molecule(s) directly bonded to the metal centre in CuSO4 ⋅5H2O is

Answer: (4)

18. The coordination number of Al in the crystalline state of AlCl3 is

Answer: (6)

19. The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular formula C5H10 is

Answer: (7)

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