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 = 4 10 24 ) : (1) 7.07 10 7 M (2) 10 8 M (3) 1.414 10 6 M (4) None of these CSET105JRMCT3251118-17
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) 1 35. 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. 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 CSET105JRMCT3251118-18
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 39. For a real gas under low pressure conditions and room temperature, which of the following graph is correct? (1) (2) (3) (4) CSET105JRMCT3251118-19
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) 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) CSET105JRMCT3251118-20
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 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? 4 (1) 5 (2) 4 5 (3) 4 3 (4) 3 5 CSET105JRMCT3251118-21
45. 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) All bonding molecular orbitals are gerade. (IV) C 2 is paramagnetic. (1) I, II (2) III, IV (3) I, III (4) II, IV 47. The correct statement about MnO 2 4 & Cr 2 O 7 is : (1) All the bond lengths are identical in both anions separately. (2) Both the anions are colourless & diamagnetic. (3) Both the anions are coloured & paramagnetic. (4) Both KMnO 4 & K 2 Cr 2 O 7 on heating produce same colourless paramagnetic gas. CSET105JRMCT3251118-22
48. 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) 19.48 (2) 11.5 (3) 6.25 (4) Cannot be determined COOPh CH 3 Cl OH 49. (P) (Q) (R) (S) Decide correct order of reactivity of above compounds towards electrophilic substitution reaction. (1) S > Q > P > R (2) S > Q > R > P (3) S > P > Q > R (4) Q > S > R > P 50. CH CH=CH 2 D (1) CH CH CH 2 OH D HOCl P,P is : Cl (2) CD CH 2 CH 2 OH Cl Cl (3) CH CH CH 2 D OH (4) Cl CH CH=CH 2 D CSET105JRMCT3251118-23
51. CH3 CH HX CH2 CH3 CH2 CH2 Peroxide X HX in above reaction is (1) HCl (2) HBr (3) HI (4) All of these 52. Which carbonyl compound (s) can be used to produce 2-Phenylbutan-2-ol on reaction with a suitable grignard reagent? (1) CH 3 CO CH 2 CH 3 (2) Ph CO CH 3 (3) Ph CO CH 2 CH 3 (4) All of these 53. Total number of chiral carbon atoms in prostaglandin E1 are : (1) 2 (2) 3 (3) 4 (4) 5 CSET105JRMCT3251118-24
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 56. 2 1 O N 4 3 Identify the position where electrophilic aromatic substitution reaction takes place : (1) 1 (2) 2 (3) 3 (4) 4 CSET105JRMCT3251118-25
CH 3 57. C=C H Br2 H CCl4 CH 3 Fractionaldistillati on (X) Products (Y) Value of (X + Y) is : (1) 0 (2) 1 (3) 2 (4) 3 58. The product of reaction is IBr CCl 4 (1) I Br (2) I Br (3) Br I (4) Br I CSET105JRMCT3251118-26
59. Observe the following reaction : Br O H (1)Mg/ dry ether 'M' (2)aq.NH 4Cl Major product 'M' is : MgBr (1) H O (2) OH (3) OH (4) OH CSET105JRMCT3251118-27
60. Give the structure of X. (1) (2) (3) (4) CSET105JRMCT3251118-28