SOLUTIONS OF IIT-JEE 2009

Transcription

1 R For IIT-JEE / AIEEE / EDICAL ENTRANCE EXAS JABALPUR : 55, Wright town NAGPUR : 5 E..C. Road, New Ramdaspeth & Pragati Colon GWALIR :, Ravi Nagar, Near G.D.A. SLUTINS F IIT-JEE 009 FEEL TE PWER F UR KNWLEDGE & EXPERIENCE ur Top class IITian facult team promes to give ou an authentic solution which will be fastest in the whole countr. PAPER - II [ CEISTRY] SECTIN - I Single Correct Choice Tpe Th section contains multiple choice questions. Each question has choices,, and for its answer, out of which NLY NE correct.. The spin onl magnetic moment value (in Bohr 0 Cr magneton units) of Cr( C ) : d Cr [ Ar ] Electronic Configuration in presence of C Cr [ Ar] S C C C C C C. For a f irst order reaction A P, the temperature (T) dependent rate constant (k) was f ound to f ollow the equation ( ) log k The pre-eponential T f actor A and the activation energ respectivel, are :.0 0 s and.0s and.0 0 s and.0 0 s and 9.kJ.kJ.kJ 8.kJ E a, log k 000 T log k log A ta.0 RT log A A 0sec Ea.0R 000 Ea R kj 8.kj. The correct stabilit order of the following resonance structures : C N N (I) C N N C N N C N N (III) (IV) (I) > (II) > (IV) > (III) (I) > (III) > (II) > (IV) (II) > (I) > (III) > (IV) (III) > (I) > (IV) > (II) In resonating structures octet of all atoms should be completed acc. to th structure (I) most stable then (III) more stable.. In the following carbocation; / C that most likel to migrate to the positiviel charged carbon 5 C C C C C C (II) C at C at C C at C at C ENTU : JABALPUR : (07) 00558, 000 / NAGPUR : (07) 9 / GWALIR : (075) 0597

2 C C C C C C,, C C C C C C Stabiled through hper conjugation and b I effect C C C C C C,, C C C C C C Stabiled through resonance and b I effect SECTIN - II ultiple Correct Answer Tpe Th section contains 5 multiple choice questions. Each question has choices,, and for its answer, out of which NE R RE /are correct. 9. Among the following, the state function(s) (are): Internal energ Irreversible epansion work Reversible epansion work olar enthalp (A,D) State functions are internal energ and ar enthalp.. The correct statement(s) about the following sugars X and Y (are) : C C C C C X a reducing sugar and Y a non-reducing sugar. X a non-reducing sugar and Y a reducing sugar. The glucosidic linkages in X and Y are α and β, respectivel. The glucosidic linkages in X and Y are β and α, respectivel. (B, C) 7. For the reduction of N ion in an aqueous solution E 0.9 V. Values of E for some metal ions are given below V (aq) e Fe (aq) e Au (aq) e g (aq) e V E -.9 V Fe E -0.0 V Au E.0 V g E 0.8 V The pair(s) of metals that (are) oidized b N in aqueous solution (are) : V and g Fe and Au (A,B,D) 8. In the reaction g and Fe Fe and V ( ) [ ] X B B X B the amine(s) X (are) : N CN ( C ) N ( C ) When B reacts with ecess of N at low 0 temperature ( 0 C) it forms an addition compound called diammoniate of diborane B N which forms a conducting solution in liquid ammonia B N(Ecess) B Nwhite nv solid (Ionic Compound) B N N B N ENTU : JABALPUR : (07) 00558, 000 / NAGPUR : (07) 9 / GWALIR : (075) 0597

3 9. The nitrogen oide(s) that contain(s) N.N bond(s) (are) : N N N N5 (A, B, C) Assmmetrical form Smmetrical form (i) N N N (ii) N N N (iii) N5 N N N N (iv) N N N N ( ) Cu N Cu N N ( ) ( ) Zn 0N dil Zn N N 5 ( ) ( ) Zn N conc Zn N N. atch each of the compounds given in Column I with the reaction(s), that the can undergo, given in Column II Column I SECTIN - III atri - atch Tpe Th section contains questions. Each question contains statements given in two columns, which have to be matched. The statements in Column-I are labelled A, B, C and D, while the statements in Column-II are labelled p, q, r, s and t. An given statement in Column-I can have correct matching with NE R RE statement(s) in Column-II. The appropriate bubbles corresponding to the answers to these questions have to be drakened as illustrated in the following eample. If the correct matches are A-p, s and t; B-q and r; C-p and q; and D-s and t; then the correct darkening of bubbles will look like the following : 0. atch each of the reactions given in column I with the corresponding products (s) given in column II Column I Column II Cu dil N (p) N Cu conc N (q) N Zn dil N (r) N Zn conc N (s) Cu ( N ) (t) Zn( N ) A p, s C r, t B q, s D q, t ( ) Cu 8 N ( dil) Cu N N ENTU : JABALPUR : (07) 00558, 000 / NAGPUR : (07) 9 / GWALIR : (075) 0597 C N Column II (p) Nucleophilic substitution (q) Elimination (r) Nucleophilic addition (s) Esterification with acetic anhdride (t) Dehdrogenation p, q p,s,t r, s p C N NPSR Elimination p,q NPSR p,s,t Esterification with acetice anhdride Dehdrogenation because of α hdrogen Nucleophilic addtion r,s Nucleophilic substitution (p)

4 SECTIN - IV Integer Answer Tpe Th section contains 8 questions. The answer to each of the questions a single digit integer, ranging from 0 to 9. The appropriate bubbles below the respectivel question numbers in the RS have to be darkened. For eample, if the correct answers to question number X, Y, Z and W (sa) are, 0, 9 and, respectivel, then the correct darkening of bubbles will like the following :. The total number of cclic structural as well as stereo omers possible for a compound with the 7 ecular formula C50 C50 C C C C C C C C C C C C C C. The total number of α and β particles emitted 8 in the nuclear reaction U pb U Pb number of α particle number of β particle (9 8) 0 sum of α and β -particle 8. At 00 K, the root mean square (rms) speed of a gas X (ecular weight 0) equal to the most probable speed of gas Y at 0 K. The ecular weight of the gas Y RT RT T T The oidation number of n in the product of alkaline oidative fusion of n Reaction of alkaline oidative fusion of n n K K n oidation number of n in Kn. The Coordination number of Al in the crstalline state of AlCl AlCl ets as a close packed lattice of Cl with Al occuping octahedral holes. ence cordination number of Al 7. The dsociation constant of a substituted benzoic acid at 5 C.0 0. The p of 0.0 solution of its sodium salt 8 p 7 pka log C 7 log(0.0) 7 8 ENTU : JABALPUR : (07) 00558, 000 / NAGPUR : (07) 9 / GWALIR : (075) 0597

5 5 8. In a constant volume calorimeter,.5 g of a gas with ecular weight 8 was burnt in ecess ogen at 98.0 K. The temperature of the calorimeter was found to increases from 98.0 K to 98.5 K due to the combustion process. Given that the heat capacit of the calorimeter 9.5kJ K, the numerical value for the enthalp of combustion of the gas in kj 9. The number of water ecule (s) directl bonded to the metal centre in CuS 5 The Cu ion found to be at the centre of an octahedron of Si -vel changed -atom. Form of them belong to four water ecule and the form. Sequare with the Cu ion and the other two atoms comes from sulphate ion. ( m w) S( T T ) E ( w m).5 ( ) (.5 8) Kj / ENTU : JABALPUR : (07) 00558, 000 / NAGPUR : (07) 9 / GWALIR : (075)