iitjee 2006

Q.8 B(OH) 3+ NaOH NaBO 2+ Na[B(OH) 4]+ H 2OThe reaction can be made to proceed in theforward direction by adding :(a) cis 1,2 diol (b) borax(c) trans 1, 2 diol (d) Na 2HPO 4Ans. (a)Q.9 The conversion A to B is carried out by thefollowing path :C DGiven : ∆S (A →C) = 50 e.u. , ∆S (C →A BD) = 30 e.u. , ∆S (B → D)= 20 e.u.Where e.u. is entropy unit then ∆S (A → B)is :(a) +100 e.u.(b) + 60 e.u.(c) –100 e.u.(d) – 60 e.u.Ans. (b)(c) The catalyst will increase the rate of forwardreaction by α and that of backward reaction β.(d) If the reaction is carried out at 400 K thenforward rate constant remains unaffectedwhile the backward rate constant isdecreased.Ans. (a)Section II : Multiple Choice Questions with one ormore correct answer(s).Q.13 The bond length of CO is 1.128Å. The bondlength of CO in Fe(CO) 5is (in Armgostrons)(a) 1.76 (b) 1.128(c) 1.15 (d) 1.118Ans. (d)OQ.14 CH – C – CH3 3+ next homologueQ.10 CuSO 4decolorizes on addition of KCN theproduct is :(a) [Cu(CN) 4] 2–(b) Cu 2+ get reduced to form [Cu(CN) 4)] 3–(c) CuCN(d) Cu(CN) 2Ans. (b)Q.11 Ag + + NH 3[Ag(NH 3) + ] ; K 1= 1.6 × 10 3[Ag(NH 3 )] + + NH 3 [Ag(NH 3 ) 2 ] +K 2 = 6.8 × 10 3The formation constant of [Ag(NH 3 ) 2 ] + is(a) 6.08 × 10 6 (b) 1.08 × 10 7(c) 1.08 × 10 3 (d) 3.8 × 10 5Ans.Q.12 In the Haber process which of the following iscorrect if the reaction is carried out in a vesselof constant volumeN 2 + 3H 2 2NH 3(a) If N 2 is added the equilibrium will shift toright. Because according to II law ofthermodynamics entropy must increase inthe direction of spontaneous reaction.(b) The condition for equilibrium isG N + 3G2 H = 2G2 NH where G is Gibbs3free energy per mole of the gaseous speciesmeasured at that partial pressure. Thecondition of equilibrium is unaffected by theuse of catalyst which increases the rate ofboth the forward reaction by α and that ofbackward reaction by β.(b)Q.15NH OH 2mixtureFollowing statements is/are correct aboutmixture :(a) mixture is 3-types of oximes(b) mixture is 2-types of oximes(c) all are optically active(d) one is optically active.Ans. (a)P(a)(b)CH –CH –CH –Cl3 2 2(i) O 2/ ∆+(ii) H 3O& Q are :AlC l 3P Q ++ PhenolOand CH – CH – C – H3 2and CH 3 – C – CH3(c) and CH 3 – C – CH3(d)OOOand CH – CH – C – H3 2Ans.(c)CAREER POINT, 112, SHAKTI NAGAR , KOTA (RAJ) PH. 25004929PAPER - IIT-JEE-2006