Category I (Q.41 to Q.70)

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1 CHEMISTRY Ctegory I (Q.41 to Q.70) Only one nswer is correct. Correct nswer will fetch full mrks 1. Incorrect nswer or ny combintion of more thn one nswer will fetch ¼ mrks. No nswer will fetch 0 mrks. 41. Among Me 3 N, C 5 H 5 N nd MeCN (Me = methyl group) the electronegtivity of N is in the order MeCN > C 5 H 5 N > Me 3 N Me 3 N > MeCN > C 5 H 5 N 4. The shpe of XeF5 will be : () C 5 H 5 N > Me 3 N > MeCN Electronegtivity sme in ll Squre pyrmid Plnr () Trigonl bipyrmidl Pentgonl bipyrmid 43. The ground stte mgnetic property of nd C molecules will be prmgnetic nd C dimgnetic () dimgnetic nd C prmgnetic oth re dimgnetic oth re prmgnetic 44. The number of unpired electrons in [NiCl 4 ], Ni(CO) 4 nd [Cu(NH 3 ) 4 ] + respectively re,, 1 (), 0, 1 0,, 1,, Which of the following toms should hve the highest 1 st electron ffinity? F () O N C 46. PbCl is insoluble in cold wter. Addition of HCl increses its solubility due to Formtion of soluble complex nions like [PbCl 3 ] () Oxidtion of Pb () to Pb(IV) Formtion of [Pb(H O) 6 ] + Formtion of polymeric led complexes 47. Of the following compounds, which one is the strongest ronsted cid in queous solution? HClO 3 () HClO HOCl HOr 48. The correct bsicity order of the following lnthnide ions is L 3+ > Lu 3+ > Ce 3+ > Eu 3+ () Ce 3+ > Lu 3+ > L 3+ > Eu 3+ Lu 3+ > Ce 3+ > Eu 3+ > L 3+ L 3+ > Ce 3+ > Eu 3+ > Lu 3+ HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : 9

2 49. When Cl is dded to n queous slt solution, white precipitte is obtined. The nion mong CO3, SO 3 nd SO 4 tht ws present in the solution cn be CO 3 but not ny of the other two () SO 3 but not ny of the other two SO 4 but not ny of the other two Any of them 50. In the IUPAC system, CH CH CO H is nmed s 3-phenylpropnoic cid crboxyethylbenzene () benzylcetic cid -phenylpropnoic cid 51. The isomeristion of 1-butyne to -butyne cn be chieved by tretment with hydrochloric cid mmonicl cuprous chloride () mmonicl silver nitrte ethnolic potssium hydroxide 5. The correct order of cid strengths of benzoic cid (X), peroxybenzoic cid (Y) nd p-nitrobenzoic cid (Z) is Y > Z > X () Z > Y > X Z > X > Y Y > X > Z 53. The yield of cetnilide in the rection (100% conversion) of moles of niline with 1 mole of cctic nhydride is 70 g () 135 g 67.5 g 177 g 54. The structure of the product P of the following rection is + N (i) CO (high temperture nd high pressure) + P (ii) H 3 O CO H () CO H CO H HO C CO H CO H HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : 10

3 55. AP nd ATP differ in the number of phosphte units () ribose units denine bse nitrogen tom 56. The compound tht would produce nuseting smell/odour with hot mixture of chloroform nd ethnolic potssium hydroxide is CONH () NHCH 3 NH 57. For the rection below (i) Mgr, THF + Q (ii) H 3 O CN the structure of the product Q is () O CN NH HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : You re supplied with 500 ml ech of N HCl nd 5N HCl. Wht is the mximum volume of 3M HCl tht you cn prepre using only these two solutions 50 ml () 500 ml 750 ml 1000 ml 59. Which one of the following corresponds to photon of highest energy? = 300 nm () = s 1 = 30 cm 1 = J 60. Assuming the compounds to be completely dissocited in queous solution, identify the pir of the solutions tht cn be expected to be isotonic t the sme temperture : 0.01 M Ure nd 0.01 M NCl () 0.0 M NCl nd 0.01 M N SO M NCl nd 0.0 M MgCl 0.01 M Sucrose nd 0.0 M glucose 61. How mny frdys re required to reduce 1 mol of Cr O 7 to Cr 3+ in cid medium? () Equilibrium constnts for the following rections t 100 K re given H O(g) H (g) + O (g); K 1 = CO (g) CO(g) + O (g); K = The equilibrium constnt for the rection H (g) + CO (g) CO(g) + H O(g) t 100 K will be 0.05 ()

4 63. log V M 1 M T = const. log P For sme mss of two different idel gses of moleculr weights M 1 nd M. Plots of log V vs log P t given constnt temperture re shown. Identify the correct option M 1 > M () M 1 = M M 1 < M Cn be predicted only if temperture is known 64. Which of the following hs the dimension of MLºT? Coefficient of viscosity Vpour pressure 65. If the given four electronic configurtions () Surfce tension Kinetic energy (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = (iv) n = 3, l = 1 re rrnged in order of incresing energy, then the order will be (iv) < (ii) < (iii) < (i) () (ii) < (iv) < (i) < (iii) (i) < (iii) < (ii) < (iv) (iii) < (i) < (iv) < (ii) 66. Which of the following sets of quntum numbers represents the 19 th electron of Cr(Z = 4)? 4, 1, 1, () 4, 0, 0, 3,, 0, 3,,, HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : g of n cid is needed to completely neutrlize 0 ml 0.1(N) N solution. The equivlent weight of the cid is 53 () In flsk, the weight rtio of CH 4 (g) nd SO (g) t 98 K nd 1 br is 1 :. The rtio of the number of molecules of SO (g) nd CH 4 (g) is 1 : 4 () 4 : 1 1 : : C 6 H 5 F 18 is F 18 rdio-isotope lbelled orgnic compound. F 18 decys by positron emission. The product resulting on decy is C 6 H 5 O 18 () C 6 H 5 Ar 19 1 C 5 H 5 F C 6 H 5 O issolving NCN in de-ionized wter will result in solution hving ph < 7 () ph = 7 p = 7 ph > 7

5 Ctegory II (Q.71 to Q.75) Only one nswer is correct. Correct nswer will fetch full mrks. Incorrect nswer or ny combintion of more thn one nswer will fetch ½ mrks. No nswer will fetch 0 mrks. 71. Which of the following solutions will turn violet when drop of lime juice is dded to it? A solution of NI () A solution mixture of KI nd NIO 3 A solution mixture of NI nd KI A solution mixture of KIO 3 nd NIO 3 7. The rection sequence given below gives product R. (i) Ag O (ii) r, CCl 4 R The structure of the product R is r () r r r 73. Reduction of the lctol S S with sodium borohydride gives () O HO 74. Wht will be the normlity of the slt solution obtined by neutrlizing x ml y (N) HCl with y ml x (N) N, nd finlly dding (x + y) ml distilled wter? x y N xy () xy x y N xy N x y x y N xy HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : 13

6 75. In close-pcked body-centred cubic lttice of potssium, the correct reltion between the tomic rdius (r) of potssium nd the edge-length () of the cube is r () r 3 r 3 r 3 4 Ctegory III (Q.76 to Q80) One or more nswer(s) is (re) correct. Correct nswer(s) will fetch mrks. Any combintion contining one or more incorrect nswer will fetch 0 mrks. Also no nswer will fetch 0 mrks. If ll correct nswers re not mrked nd lso no incorrect nswer is mrked then score = number of correct nswers mrked ctul number of correct nswers. 76. The role of fluorspr, which is dded in smll quntities in the electrolytic reduction of lumin dissolved in fused cryolite, is s ctlyst () to mke fused mixture conducting to lower the melting temperture of the mixture to decrese the rte of oxidtion of crbon t node Solution : (, C) 77. The reduction of benzenedizonium chloride to phenyl hydrzine cn be ccomplished by SnCl, HCl () N SO 3 CH 3 CH H 3 PO Solution : (A, ) 78. The mjor product(s) obtined from the following rection of 1 mole of hexdeuteriobenzene is/re (i) r (1 mole), Fe (ii) H O r () r r r H HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : 14

7 79. Identify the correct sttement(s) : The findings from the ohr model for H-tom re Angulr momentum of the electron is expressed s integrl multiples of h () The first ohr rdius is 0.59 Aº 1 The energy of the n-th level E n is proportionl to n The spcing between djcent levels increses with increse in n Solution : (A, ) 80. uring electrolysis of molten NCl, some wter ws dded. Wht will hppen? Electrolysis will stop. () Hydrogen will be evolved Some mount of custic sod will be formed. A fire is likely. Solution : (, C, ) HEA OFFICE : 96K, S.P. Mukherjee Rod, Hzr More, Kolkt-70006, / WESITE : 15

Homework 04. Acids, Bases, and Salts

Homework 04. Acids, Bases, and Salts HW04 - Acids, Bses, nd Slts! This is preview of the published version of the quiz Strted: Feb 21 t 8:59m Quiz Instruc!ons Homework 04 Acids, Bses, nd Slts Question 1 In the reversible rection HCN + H O