CHEMISTRY IIT JEE 2009

SECTION – I

This section contains 4 multiple choice questions. Each question has 4 choices (a), (b), (c) and (d), out of which Only One is correct

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

(A) CH₃ at C-4

(B) H at C-4

(C) CH₃ at C-2

(D) H at C-2

2. 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)

3. 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

(A) 1.0 x 10⁶ s^-1 and 9.2 kJ mol ^-1

(B) 6.0 s^-1 and 16.6 kJ mol ^-1

(C) 1.0 x 10⁶ s^-1 and 16.6 kJ mol ^-1

(D) 1.0 x 10⁶ s^-1 and 38.3 kJ mol ^-1

SECTION – II

This section contains 5 multiple choice questions. Each question has 4 choices (a), (b), (c) and (d), out of which One or More is/are correct

5. The nitrogen oxide(s) that contain(s) N – N bond(s) is (are)

(a) N₂O

(b) N₂O₃

(c) N₂O₄

(d) N₂O₅

(A) a, b, c          (B) a, b, d               (C) b, c             (D) a, d

6. 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

(A) a, c, d               (B) b, c, d       (C) a, b, c               (D) a, c

7. 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 glycosidic linkages in X and Y are α and β respectively

(d) the glycosidic linkages in X and Y are β and α respectively

(A) a, c             (B) b, c             (C) c, d              (D) a, c, d

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

(a) internal energy

(b) irreversible expansion work

(c) reversible expansion work

(d) molar enthalpy

(A) a, c             (B) b, c               (C) c, d              (D) a, d

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

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

(A) a, b, d            (B) b, c, d                (C) a, c, d                (D) c, 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 labeled A, B, C and D, while the statements in column II are labeled 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 compounds given in Column – I with the reaction(s), that they can undergo given in Column – II

(A) (a: p, q, t) (b: p, q, s, t), (c: rs), (d: p)

(B) (a: p, q, s, t) (b: r, s) (c: p) (d: p, q, t)

(C) (a: r, s ) (b: p) (c: p, q, t) (d: p, q, r, s, t)

(D) (a: p) (b: p, q, t) (c: p, q, r, s, t) (d: r, s)

11. Match each of the reactions given in column – I with the corresponding product(s) given in column – II

(A) (a: q, t) (b: ps) (c: q, s) (d: r, t)

(B) (a: p, s) (b: q, s) (c: r, t) (d: q, t)

(C) (a: q, s) (b: r, t) (c: q, t) (d: p, s)

(D) (a: r, t) (b: q, t) (c: p, s) (d: r, t)

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

(A) 4         (B) 5                (C) 6                (D) 7

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

(A) 4         (B) 5                (C) 6                (D) 7

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

(A) 3         (B) 4                 (C) 5                 (D) 6

15. 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 298.0K to 298.45K due to the combustion process. Given that the heat capacity of the calorimeter is 2.5kJ K^-1, the numerical value for the enthalpy of combustion of the gas is kJ mol-1 is

(A) 8 kJ mol-1             (B) 9 kJ mol-1            (C) 6 kJ mol-1       (D) 5 kJ mol-1

16. The dissociation constant of a substituted benzoic acid at 250C is 1.0 x 10^-4. The pH of a 0.01 M solution if its sodium salt is

(A) 8                        (B) 9                           (C) 6                    (D) 7

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

(A) 5                       (B) 6                           (C) 7                      (D) 8

(A) 5                      (B) 6                        (C) 7                         (D) 8

19. At 400K, 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

(A) 3                     (B) 4                        (C) 5                         (D) 6