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1 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 which E R MRE are correct. 21. In a galvanic cell the salt bridge (A) does not participate chemically in the cell reaction. (B) stops the diffusion of ions from one electrode to another. () is necessary for the occurrence of the cell reaction. (D) ensures mixing of the two electrolytic solutions. 21. (A) Prerna Tower Road o - 2 ontractors Area Bistupur Jamshedpur-01 Phone : The pair(s) of reagents that yield paramagnetic species is/are (A) a and excess of 3 (B) K and excess of 2 () u and dilute 3 (D) 2 and 2-ethylanthraquinol 22. (AB) D is wrong because 2 and ethyl anthra quinol gives 2 2 which is diamagnetic. Rest all form paramagnetic species. a + 3 a + and ammoniated electron K + 2 K 2 super oxide u + 3 u For the reaction : I S 4 + S 4 + I 2 The correct statement(s) in the balanced equation is /are : (A) Stoichiometric coefficient of S 4 is 6. (B) Iodide is oxidized. () Sulphur is reduced (D) 2 is one of the products. 23. (ABD) ( 2I I 2 + 2e ) 3 6e I S 4 3I S 4 JEE Advanced 2014 (25-May-14) Question & Solutions Paper-I www. prernaclasses.com

2 24. Upon heating with u 2 S the reagent(s) that give copper metal is /are (A) ufes 2 (B) u () u 2 (D) us (BD) 25. The correct statement(s) for orthoboric acid is/are (A) It behaves as a weak acid in water due to self ionization. (B) Acidity of its aqueous solution increases upon addition of ethylene glycol. () It has a three dimensional structure due to hydrogen bonding. (D) It is a weak electrolyte in water. 25. (BD) Acidic character of orthoboric acid is due to contribution of + from The correct combination of names for isomeric alcohols with molecular formula 4 10 is /are (A) tert-butanol and 2-methylpropan -2-ol (B) tert- butanol and 11-dimethylethan-1-ol () n-butanol and butan -1-ol (D) isobutyl alcohol and 2-methylpropan-1-ol 26. (AD) The reactivity of compound Z with different halogens under appropriate conditions is given below : Z X 2 ( 3) 3 mono halo substituted derivative when X2 = I2 di halo substituted derivative when X2 = 2 tri halo substituted derivative when X2 = 2 The observed pattern of electrophilic substitution can be explained by (A) the steric effect of the halogen (B) the steric effect of the tert-butyl group () the electronic effect of the phenolic group (D) the electronic effect of the tert-butyl group 27. (AB) JEE Advanced 2014 (25-May-14) Question & Solutions Paper-I www. prernaclasses.com

3 2 I2 I (Me)3 I2 (Me)3 (Me)3 (Me)3 28. An ideal gas in a thermally insulated vessel at internal pressure = P 1 volume = V 1 and absolute temperature = T 1 expands irreversibly against zero external pressure as shown in the diagram. The final internal pressure volume and absolute temperature of the gas are P 2 V 2 and T 2 respectively. For this expansion P ext = 0 P 1 V 1 T 1 Irreversible Thermal insulation P ext = 0 P2 V2 T2 (A) q = 0 (B) T 2 = T 1 () P 2 V 2 = P 1 V 1 (D) P 2 V 2 = P 1 V (AB) Since the process is adiabatic q = 0 w = 0 E = 0 T = ydrogen bonding plays a central role in the following phonomena: (A) Ice floats in water. (B) igher Lewis basicity of primary amines than tertiary amines in aqueous solutions. () Formic acid is more acidic than acetic acid. (D) Dimension of acetic acid in benzene. 29. (ABD) The low acidic character of acetic acid is due to inductive effect. JEE Advanced 2014 (25-May-14) Question & Solutions Paper-I www. prernaclasses.com

4 30. In the reaction shown below the major product(s) formed is /are 2 (A) () 30. (A) 2 acetic anhydride Product(s) (B) (D) JEE Advanced 2014 (25-May-14) Question & Solutions Paper-I www. prernaclasses.com

5 SETI - II (ne Integer Value orret Type) This section contains a group of 10 questions. Each question when worked out will result in one integer from 0 to 9 (both inclusive) 31. MX 2 dissociates into M 2+ and X ions in an aqueous solution with a degree of dissociation ( ) 0f 0.5.The ratio of the observed depression of freezing point of the aqueous solution to the value of the depression of freezing point in the absence of ionic dissociation is 31. (2) MX 2 M X 1 2 Tf ' (1 2 ) 2 T f 32. In an atom the total number of electrons having quantum numbers n = 4 m l = 1 and m s = ½ is 32. (6) n = 4 l = s p d f The total number of distinct naturally occuring amino acids obtained by complete acidic hydrolysis of the people shown below is 33. (1) only one naturally occuring amino acids. 34. If the value of Avogadro number is mol 1 and the value of Boltzmann constant is J K 1 then the number of significant digits in the calculated value of the universal gas constant is 34. (4) R = K Since K & has 4 digits significant figure is 4. JEE Advanced 2014 (25-May-14) Question & Solutions Paper-I www. prernaclasses.com

6 35. A compound 2 X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g ml 1. Assuming no change in volume upon dissolution the molality of a 3.2 molar solution is 35. (8) Mass of solvent = 400 g / L m = ( ) / 400 = The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are) 36. (3) 37. A list of species having the formula XZ 4 is given below. XeF 4 SF 4 SiF 4 BF 4 F 4 [u( 3 ) 4 ] 2+ [Fe 4 ] 2 [o 4 ] 2 and [Pt 4 ] 2. Defining shape on the basic of the location of X and Z atoms the total number of species having a square planar shape is 37. (4) XeF 4 (sp 3 d 2 ) F 4 (sp 3 d 2 ) [u( 3 ) 4 ] +2 (sp 2 d) [Pt 4 ] 2 (dsp 2 ) 38. onsider the following list of reagents : Acidified K 2 r 2 7 alkaline KMn 4 us Fe 3 3 and a 2 S 2 3. The total number of reagents that can oxidise aqueous iodide to iodine is 38. (7) K 2 r 2 7 us Fe 3 3 give iodine with KI solution. Alkaline KMn 4 gives Kl onsider all possible isomeric ketones including stereoisomers of MW = 100. All these isomers are independently reacted with ab 4 (TE : stereoisomers are also reacted separately). The total number of ketones that give a racemic product(s) is/are 39. (5) (A) (B) () (D) ut of these (B) gives mixtures of diastereomers. 40. Among PbS us gs MnS Ag 2 S is os Bi 2 S 3 and SnS 2 the total number of BLAK coloured sulphide is 40. (7) PbS us gs Ag 2 S is os Bi 2 S 3 are black precipitates. (E) (F) JEE Advanced 2014 (25-May-14) Question & Solutions Paper-I www. prernaclasses.com

PART I - PHYSICS. Section-1 (One or More than one options correct type)

PART I - PHYSICS. Section-1 (One or More than one options correct type) PART I - PHYSICS Section- (One or More than one options correct type) This section contains 0 multiple choice questions. Each question has four choices,, and (D). At time t = 0, terminal A in the circuit