PART B. Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27,

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1 PART B Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27, Si = 28, P = 31, S = 32, Cl = 35.5, K = 39, Ca = 40, Cr = 52, Mn = 55, Fe = 56, Cu = 63.5, Zn = 65, As = 75, Br = 80, Ag = 108, I = 127, Ba = 137, Hg = 200, Pb = 207] SECTION - I Straight Objective Type This section contains 30 multiple choice questions. Each question has 4 choices (1), (2), (3) and (4) for its answer, out of which ONLY ONE is correct. 31. The vapour density of N 2 O 4 at a certain temperature is 30. Calculate the percentage dissociation of N 2 O 4 at this temperature. N 2 O 4 (g) 2NO 2 (g) (1) 9.4% (2) 36.8% (3) 18.7% (4) 53.3% 32. Molar solubility of Hg 2 I 2 in distilled water is (K sp = ) : (1) M (2) 10 8 M (3) M (4) None of these C05ERMCT C0-17

2 33. Select the correct option(s) : (I) r F r H (II) r Br r Cl (III) r (r r ) > r (r r ) Cl F Br (IV) r (r r ) > r (r r ) Br Cl Cl (1) I, II, IV (2) II, IV (3) II, III (4) only II Cl F 34. A six co-ordinate complex has the formula CoCl 3.5NH 3.H 2 O. Electrical conductance measurements indicate the presence of three ions in one formula unit. How many moles of AgCl will be percipitated with excess AgNO 3 solution with two mole of complex? (1) 4 (2) 3 (3) 2 (4) Which of the following statement is true for azide ion N3? (1) It can act as bidentate ligand. (2) Two N N bond lengths are different in the anion. (3) It is isoelectronic and isostructural with CO 2. (4) There are two and three bonds in it. C05ERMCT C0-27

3 36. Boyle temperature for N 2 if its a and b values are 1.39 litre 2 atm mol 2 and 39.0 ml/mol is. (1) 434 K (2) 234 K (3) 334 K (4) 534 K 37. What volume (in L) of 6 M NaOH would be required to react with the SO 2 produced from 1000 Kg of coal containing 0.072% by mass of pyrites impurity according to the given reaction? [Given : FeS 2 O2 SO2 FeO ], [SO2 NaOH Na2SO3 H2O] (1) 1 L (2) 2 L (3) 3 L (4) 4 L 38. Aqueous solution of how many of the following compounds is/are basic? KI, KCN, CH 3 COONa, FeCl 3, Aniline, Pyridinium Chloride, PhONa, CuCl 2. (1) 2 (2) 3 (3) 4 (4) 8 C05ERMCT C0-37

4 39. For a real gas under low pressure conditions and room temperature, which of the following graph is correct? (1) (2) (3) (4) 40. Amongst the following select correct statement regarding 3d xy orbital : (I) It has four lobes and two angular nodes. (II) It has four lobes and one angular node. (III) The orbital angular momentum of e in this orbital is 6 h 2 (IV) It is non degenerate to 3d 2 2 orbital. x y Correct answer is : (1) Only (I) (2) (I) and (III) (3) (II) and (III) (4) (I) and (IV) C05ERMCT C0-47

5 41. Total number of stereo isomers for [RhH(C CR) 2(PMe 3) 3] is : (1) 2 (2) 3 (3) 4 (4) None of these 42. In the extraction of copper from its sulphide ore (CuFeS 2 ), the metal is finally obtained by the reduction of cuprous oxide with : (1) Copper (I) sulphide (Cu 2 S) (2) Sulphur dioxide (SO 2 ) (3) Iron sulphide (FeS) (4) Carbon monoxide (CO) 43. Which of the following have non-zero dipole moment? (I) SF 4 (II) SF 6 (III) XeO 2 F 2 (IV) SO 3 (1) Only I (2) I, IV (3) I, III (4) II, IV C05ERMCT C0-57

6 44. How many moles of KMnO 4 are needed to oxidise a mixture of 1 mole of each FeSO 4 & FeC 2 O 4 in acidic medium? (1) 5 4 (2) 4 5 (3) 4 3 (4) Which of the following can is/are optically active (EDTA 4 is ethylenediaminetetraacetate ion)? (I) [Co(en) 2 Br 2 ] (II) [Co(en)(NH 3 ) 2 Cl 2 ] + (III) [Cr(ox) 2 (dmg)] 2 (IV) [Pb(EDTA)] 2 (1) I, III (2) I, II, III, IV (3) I, III, IV (4) II, IV 46. Which statement(s) is/are incorrect? (I) O2 is paramagnetic and bond order is greater than O 2. (II) N 2 can undergo both oxidation and reduction. (III) Bonding molecular orbitals have high energy than antibonding molecular orbitals (IV) C 2 is paramagnetic. (1) I, II (2) III, IV (3) I, III (4) II, IV C05ERMCT C0-67

7 47. Of the following molecules, the one, which has permanent dipole moment is : (1) SiF 4 (2) BF 3 (3) PF 3 (4) PF A gaseous mixture of H 2 and CO 2 gas contains 88% by mass of CO 2. The vapour density of the mixture is? (1) (2) 11.5 (3) 6.25 (4) Cannot be determined 49. Amphoteric behaviour is shown by the oxides of : (1) Al and Ca (2) Pb and Ba (3) Cr and Mg (4) Sn and Zn C05ERMCT C0-77

8 50. The following molecules / species have been arranged in the order of their increasing bond orders, Identify the correct order. (I) O 2 (II) O 2 - (III) O 2 2- (IV) O 2 + (1) III < II < I < IV (2) IV < III < II < I (3) III < II < IV < I (4) II < III < I < IV 51. Densities of diamond and graphite are 3.5 and 2.3 g/ml. C (diamond) C (graphite) ΔrH = -1.9 kj/mole Favourable conditions for formation of diamond are (1) high pressure and low temperature (2) low pressure and high temperature (3) high pressure and high temperature (4) low pressure and low temperature 52. The reaction PCl 5 (g) PCl 3 (g) + Cl 2 (g) and COCl 2 (g) CO(g) + Cl 2 (g) are simultaneously in equilibrium at constant volume. A few mole of CO(g) are introduced into the vessel. After some time, the new equilibrium concentration of (1) PCl 5 will remain unchanged (2) Cl 2 will be greater (3) PCl 5 will become less (4) PCl 5 will become greater C05ERMCT C0-87

9 53. Total number of chiral carbon atoms in prostaglandin E1 are : (1) 2 (2) 3 (3) 4 (4) 5 CHO CH 2 OH 54. H HO and H HO is CH 2 OH (I) CHO (II) Related as (1) Enantiomers (2) Diastereomers (3) Identical (4) Homologous 55. The correct order of leaving group ability is : (1) < O (2) < CH3COO (3) CH 3 COO < CH 3 O (4) Cl C05ERMCT C0-97

10 56. Which of the following compound posses centre of symmetry? (1) (2) (3) (4) 57. The newman projection formula of 2,3-dimethylbutane is given as X,Y respectively can be : (1) CH(CH 3 ) 2 and H (2) CH 3 and C 2 H 5 (3) C 2 H 5 and CH 3 (4) H and CH(CH 3 ) The compounds X and Y in below reaction can be -H2O Ph-NH.NH 2 + (X) + (Y) (1) (2) (3) (4) C05ERMCT C0-107

11 59. The best leaving group is : (1) (2) (3) (4) 60. Correct arrangement of the following nucleophiles in the order of their nucleophilic strength is : (1) C6H5O <CH3O <CH3COO <OH (2) (3) CH COO C H O <CH O OH C6H5O <CH3COO <CH3O <OH (4) CH3COO C6H5O <OH CH3O C05ERMCT C0-117

PART B. Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27,

PART B. Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27, PART B Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27, Si = 28, P = 31, S = 32, Cl = 35.5, K = 39, Ca = 40, Cr = 52, Mn = 55, Fe = 56, Cu = 63.5, Zn =