Jee Advance 2015 PART II - CHEMISTRY

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1 Prerna Tower, oad o - 2, Contractors Area, Bistupur, Jamshedpur-01, Phone : , Jee Advance 2015 Paper- 2 PAT II - CEMISTY SECTI - 1 (Maximum Marks : 32) (ne Integer Value Corret Type) P(C25)3 C 21. (5) C Fe C P(C25)3 22. Among the complex ions, [Co( 2 - C 2 - C 2-2 Cl 2 ] CChemistry +, [CrCl 2 (C 2 4 ] 3, 22. (6) All compund exhibit geometrical isomerism 23. (6B2 6 62B This section contains a group of 8 questions. Each question, when worked out will result in one integer from 0 to 9 (both inclusive) 21. In the complex acetylbromidodicarbonylbis (triethylphosphine)iron (II), the number of Fe C bond(s) is [Fe( 2 ) 4 ( ] +, [Fe( 3 4 ], [Co( 2 -C 2 - C )Cl] 2+ and [Co( 3 ) 4 ( 2 ) Cl]2+, the number of complex ion (s) that show (s) cis-trans isomerism is 23. Three moles of B 2 6 are completely reacted with methanol. The number of moles of boron containing product formed is 24. The molar conductivity of a solution of a weak acid X (0.01 M) is 10 times smaller than the molar conductivity of a solution of a weak acid Y (0.10 M). If 0 x 0 y, the difference in their pk a values, pk a (X) pk a (Y), is (consider degree of ionization of both acids to be << 1). 24. (3) x = (1 / 10 ) y X / Y ) = ( x / 0 x ) / ( y / 0 y ) = ( x / y ) = (1 /10) or, X / Y ) = (1 /100) or, K X / K Y ) = (1 /1000) pka (X) pka (Y) = 3 JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

2 25. A closed vessel with rigid walls contains 1 mol of C U and 1 mol of air at 298 K. Considering complete decay of 92 U to 82 Pb, the ratio of the final pressure to the initial pressure of the system at 298 K is 25. (9) Initial number of mole of gas = 1 mol U 82Pb 8 2e 1mol 8 mol So after decay the total number of mole of gas is = 9 mol. So ratio of final pressure to initial pressure is 9 : In dilute aqueous 2 S 4, the complex diaquodixalatoferrate (II) is oxidized by Mn 4. For this reaction, the ratio of the rate of change of [ + ] to the rate of change of [Mn 4 ] is 26. (8) [Fe(C 2 4 ( 2 ] Mn 4 Mn C 2 + Fe [ So 8 t ] [ Mn t [ ] t = 8 [ Mn4 ] t 27. The number of hydroxyl group(s) in Q is 3C 27. (4) 4 heat 0C ] aqueous dilute KMn (excess ) P Q KMn 4 / 28. Among the following, the number of reaction(s) that produce (s) benzaldehyde is C, Cl I. Anhydrous AlCl3 / CuCl II. CCl C III. CCl 2 Pd BaS4 IV. C2Me DIBAL Toluene, 78 C2 JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

3 C 28. (4) eucl C Cl Anh.Aleb / C C Cl Cl Cl C Me 2 100C C 2 PdBaS4 DIBAL C C Cl C C SECTI - 2 (Maximum Marks : 40) (ne or More ptions Correct Type) This section contains 10 multiple choice questions. Each question has four choices,, and, out of which E ME are correct. 29. Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination, respectively, are C 3 SiCl 3 and Si(C 3 ) 4 (C 3 SiCl 2 and (C 3 SiCl (C 3 SiCl 2 and C 3 SiCl 3 SiCl 4 and (C 3 SiCl Polymerisation 29. Cl Si Cl 2 Si ( Si Si )n (C 3 SiCl + 2 (C 3 Si + Cl (C 3 Si + Si(C 3 (C 3 Si Si(C 3 JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

4 30. When C 2 is adsorbed on a metallic surface, electron transfer occurs from the metal to 2. The TUE statement(s) regarding this adsorption is (are) 2 is physisorbed heat is released 2p occupancy of of 2 is increased bond length of 2 is increased 30. (BCD) Adsorption is always exothermic and 2 accept the electron to its * 2py So bond order decreases and bond length increases. 31. ne mole of a monoatomic real gas satisfies the equation p(v b) = T where b is a constant. The relationship of interatomic potential and interatomic distance r for the gas is given by 0 r 0 r 0 r 0 r 31. P(V - b)= nt, no attraction term a hence graph will be C. 32. In the following reactions, the product S is 3C 32. (AC 3 ii. Zn, 2 i. 3 S (BC (CC 3 Zn / The major product U in the following reactions is 3 reductive amination C2 C, radicalinitiator, 2 T U highpressure,heat (DC 3C C2 C2 C C 33. C2 C 2 radical initiator JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

5 34. In the following reactions, the major product W is C a2, Cl V 0 C 2, a W a / Cl 2 0 C 2Cl a 35. The correct statement(s) regarding, (i) Cl, (ii) Cl 2, (iii) Cl 3 and (iv) Cl 4, is (are) The number of Cl = bonds in (ii) and (iii) together is two The number of lone pairs of electrons on Cl in (ii) and (iii) together is three The hybridization of Cl in (iv) is sp 3 Amongst (i) to (iv), the strongest acid is (I) 35. (BC) Cl (i) Cl (ii) Cl (iii) Cl (iv) So number of lone pair on Cl in (ii) & (iii) together = = 3 & the hybridisation is sp 3 in all case. JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

6 36. The pair(s) of ions where BT the ions precipitated upon passing 2 S gas in presence of dilute Cl, is (are) Ba 2+, Zn 2+ Bi 3+, Fe 3+ Cu 2+, Pb 2+ g 2+, Bi 3+ C 36. (CD) In presence of dil. Cl, 2 S gas only group- II radicals Pb 2+, Cu 2+, g 2+, Bi 3+ are precipitated. Paragraph 1 In the following reactions 37. Compound X is 37. SECTI - 3 (Maximum Marks : 16) (Paragraph Type) This section contains 2 Paragraphs i. B26 Pd-BaS4 C86 C88 X 2 2 gs4, 2S4 i. EtMgBr, 2 ii. +, heat C 8 8 Y (C86) C C Pd / BaS4 2 ii. 22,a, 2 (C88) C C2 B26 2 2,a, 2 C gs4 2 2S 4 C (C88) EtMgBr 2 + / B C2 C2 (X) JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

7 38. The major compound Y is C 38. Paragraph 2 When 100 ml of 1.0 M Cl was mixed with 100 ml of 1.0 M a in an insulated beaker at constant pressure, a temperature increase of 5.7 C was measured for the beaker and its contents (Expt.1). Because the enthalpy of neutralization of a strong acid with a strong base is a constant ( 57.0 kj mol 1 ), the experiment could be used to measure the calorimeter constant. In a second experiment (Expt. 2), 100 ml of 2.0 M acetic acid (K a = ) was mixed with 100 ml of 1.0 M a (under identical conditions to Expt.1) where a temperature rise of 5.6 C was measured. (Consider heat capacity of all solutions as 4.2 J g 1 K 1 and density of all solutions as 1.0 g ml 1 ) 39. Enthalpy of dissociation (in kj mol 1 ) of acetic acid obtained from the Expt.2 is (C Q for 0.1 mole = M. S. T + x T x = Specific heat of calorimeter = x 5.7 x = 160 for 0.1 mole of weak acid Q = = 5.6 kj for 1 mole = 56 kj So bond energy = = 1 kj 40. The p of the solution after Expt. 2 is (A ml of 2M C 3 C ml of 1 M a forms buffer solution. [Salt] = [Acid] ence p = pka = log = 4.7 C2 JEE Advanced 2015 (24-May-15) Question & Solutions Paper www. prernaclasses.com

Prerna Tower, Road No - 2, Contractors Area, Bistupur, Jamshedpur-01, Phone : ,

Prerna Tower, Road No - 2, Contractors Area, Bistupur, Jamshedpur-01, Phone : , hemistry Paper- I Jee Advance 2014 PART II - EMISTRY SETI - I (ne or More ptions orrect Type) This section contains 10 multiple choice questions. Each question has four choices (A) (B) () and (D) out of