CHEMISTRY. AIPMT / NEET 2016 TEST PAPER WITH ANSWER & SOLUTIONS (HELD ON SUNDAY 1 st MAY, 2016)

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1 EMSTRY DE-P APMT / NEET 016 TEST PAPER WT ANSWER & SLUTNS (ELD N SUNDAY 1 st MAY, 016) 46. onsider the molecules 4, N 3 and. Which of the given statements is false? (1) The bond angle in 4, the N bond angle in N 3, and the bond angle in ar all greater than 90 () The bond angle in is larger than the bond angle in 4. (3) The bond angle in is smaller than the N bond angle in N 3. (4) The bond angle in 4 is larger than the N bond angle in N 3. 4 N ' N n the reaction (1) NaN / liq.n () X and Y are : (1) X = 1-Butyne ; Y = 3-exyne () X = -Butyne ; Y = 3-exyne (3) X = -Butyne ; Y = -exyne (4) X = 1-Butyne ; Y = -exyne NaN liq. N 3 Na exyne (1) NaN / liq.n X () 3 3 Y 3 (X) 1-Butyne NaN liq. N 3 3 Na 48. Among the following, the correct order of acidity is (1) l 3 < l 4 < l < l () l < l < l 3 < l 4 (3) l < l < l 3 < l 4 (4) l 4 < l < l < l 3 Acidic strength EN +ve.s. l < l < l 3 < l The rat e of a f irst-order react ion is 0.04 mol 1 s 1 at 10 seconds and 0.03 mol 1 s 1 at 0 seconds after initiation of the reaction. The half-life period of the reaction is : (1) 4.1 s () 34.1 s (3) 44.1 s (4) 54.1 s.303 a x1 K log (t t ) a x K log K log t 10 t 1/ 1/ sec Which one of the following characteristics is associated with adsorption? (1) G is negative but and S are positive () G, and S all are negative (3) G and are negative but S is positive (4) G and S are negative but is positive Adsorption is spontaneous process, so G = negative Adsorption is exothermic process, so = negative n adsorpiton entropy decreases, so S = negative so G, and S all are negative 51. n which of the following options the order of arrangement does not agree with the variation of property indicated against it? (1) Al 3+ < Mg + < Na + < (increasing ionic size) () B < < N < (increasing first ionisation enthalpy) (3) < < l < (increasing electron gain enthalpy) (4) Li < Na < K < Rb (increasing metallic radius) Ans. ( & 3) () B < < N < (given.p. order) B < < < N (correct) (3) < < l < (given eg order) < < < l (orrect) 11

2 APMT Which of the following statements is false? (1) Mg + ions form a complex with ATP () a + ions are important in blood clotting (3) a + ions are not important in maintaining the regular beating of the heart. (4) Mg + ions are important in the green parts of plants. Ans. (3) 53. Which of the following statements about hydrogen is incorrect? (1) hydrogen has three isotopes of which tritium is the most common. () ydrogen never acts as cation in ionic salts (3) ydronium ion, 3 + exists freely in solution (4) Dihydrogen does not act as a reducing agent Ans. (1 & 4) 54. The correct statement regarding a carbonyl co mpound with a hydrogen atom on its alphacarbon,is :- (1) a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol. () a carbonyl compound with a hydrgen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration. (3) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation. (4) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism. Keto-enol Tautomerism (Keto) (enol) 55. MY and NY 3, two nearly insoluble salts, have the same K sp values of at room temperature. Which statement would be true in regard to MY and NY 3? (1) The molar solubilities of MY and NY 3 in water are identical. () The molar solubility of MY in water is less than that of NY 3 (3) The salts MY and NY 3 are more soluble in 0.5 M KY than in pure water. (4) The addition of the salt of KY to solution of MY and NY 3 will have no effect on their solubilities. MY K s = sp s s = mol L 1 NY 3 K sp = 7 s 4 = s /4 s = mol L 1 molar solubility of NY 3 is more than MY in water. 56. n a protein molecule various amino acids are linked together by : (1) -glycosidic bond () -glycosidic bond (3) peptide bond (4) dative bond Ans. (3) Peptide bond N 57. Natural rubber has (1) All cis-configuration () All trans-configuration (3) Alternate cis-and trans-configuration (4) Random cis-and trans-configuration 3 soprene polymerisation 3 cis-polyisoprene n 1

3 58. Match items of olumn with the items of olumn and asign the correct code : (a) (b) (c) olumn- yanide process roth floatation process Electrolytic reduction (i) (ii) (iii) olumn- Ultrapure Ge Dressing of ZnS Extraction of Al (d) Zone refining (iv) Extraction of Au (v) Purification of Ni ode : (a) (b) (c) (d) (1) (iv) (ii) (iii) (i) () (ii) (iii) (i) (v) (3) (i) (ii) (iii) (iv) (4) (iii) (iv) (v) (i) 59. Which one of the following statements is correct when S is passed through acidified K r 7 solution? (1) The solution turns blue () The solution is decolourized (3) S is reduced (4) Green r (S 4 ) 3 is formed K r 7 + S + S 4 K S 4 + r (S 4 ) 3 + green colour 60. The electronic configurations of Eu(Atomic No 63), Gd(Atomic No 64) and Tb (Atomic No. 65) are (1) [Xe]4f 7 6s, [Xe]4f 8 6s and [Xe]4f 8 5d 1 6s () [Xe]4f 7 5d 1 6s, [Xe]4f 7 5d 1 6s and [Xe]4f 9 6s (3) [Xe]4f 6 5d 1 6s, [Xe]4f 7 5d16s and [Xe]4f 8 5d 1 6s (4) [Xe]4f 7 6s, [Xe]4f 7 5d 1 6s and [Xe]4f 9 6s 61. Two electrons occupying the same orbital are distinguished by (1) Principal quantum number () Magnetic quantum number (3) Azimuthal quantum number (4) Spin quantum number DE-P Two electrons occupying the same orbital differ by spin quantum number. 6. Which copper is heated with conc. N 3 it produces (1) u(n 3 ) and N () u (N 3 ) and N (3) u(n 3 ), N and N (4) u(n 3 ) and N u + 4N 3 (conc.) u(n 3 ) + N Which of the following reagents would distingusih cis-cyclopenta-1,-diol from the trans-isomer? (1) Acetone () zone (3) Mn (4) Aluminium isopropxide G = T.S or, < 0 and S > 0, G = ve (always) spontaneous at all temperatures. 64. The correct thermodynamic conditions for the spontaneous reaction at all temperatures is (1) < 0 and S = 0 () > 0 and S < 0 (3) < 0 and S > 0 (4) < 0 and S < 0 Ans. (3) G = T.S or, < 0 and S > 0, G = ve (always) spontaneous at all temperatures. 65. Lithium has a bcc structure. ts density is 530 kg m 3 and its atomic mass is 6.94 g mol 1. alculate the edge length of a unit cell of Lithium metal. (N A = mol 1 ) (1) 154 pm () 35 pm (3) 57 pm (4) 64 pm Z M N a 3 A or bcc structure Z =, = 530 kg m 3 = g cm a 3 3 a 3 = cm 3 a = cm a = 35 pm 13

4 APMT Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules? (1) > > l > () l > > > (3) > > > l (4) > l > > > > > due to high p-p repulsion 67. Which of the following is an analgesic? (1) Novalgin () Penicillin (3) Streptomycin (4) hloromycetin Novalgin used as analgesic 68. Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape? (1) 1/8 () 1/4 (3) 3/8 (4) 1/ n n and t t According to Graham's law r M v 1 / t1 3 r M v / t 69. onsider the nitration of benzene using mixed conc. S 4 and N 3. f a large amount of KS 4 is added to the mixture, the rate of nitration will be:- (1) faster () slower (3) unchanged (4) doubled Slower, as large amount of S 4 will decrease ionisation of S 4 that result in lesser ionisation of nitric acid and lesser formation of nitronium ion [ N + ] 70. Predict the correct order among the following :- (1) lone pair- lone pair > lone pair - bond pair > bond pair - bond pair () lone pair - lone pair > bond pair - bond pair > lone pair - bond pair (3) bond pair - bond pair > lone pair - bond pair > lone pair - lone pair (4) lone pair - bond pair > bond pair - bond pair > lone pair - lone pair 71. The product obtained as a result of a reaction of nitrogen with a is :- (1) a(n) () an (3) an 3 (4) a N Ans. (Bonus) (Question should bebonous) a + N an + 7. onsider the following liquid - vapour equilibrium. Liquid Vapour Which of the following relations is correct? (1) () dn G dt RT v d n P dt RT v 1 / 1 / x 16 4 (3) d n P dt T v x 4 x = 8 raction of = 1/8 (4) d np dt RT lausius - lapeyron's equation d ln P dt V RT v 14

5 DE-P 73. Match the compounds given in column with the hybridisation and shape given in column and mark the correct option. olumn- olumn- (a) Xe 6 (i) Distorted octahedral (b) Xe 3 (ii) Square planar 75. The pressure of required to make the potential of -electrode zero in pure water at 98 K is :- (1) atm () 10 1 atm (3) atm (4) 10 4 atm + (aq) + e (g) (c) Xe 4 (iii) pyramidal (d) Xe 4 (iv) Square pyramidal ode :- (a) (b) (c) (d) (1) (i) (iii) (iv) (ii) () (i) (ii) (iv) (iii) (3) (iv) (iii) (i) (ii) (4) (iv) (i) (ii) (iii) Xe 6 Xe 3 Xe Xe distorted Pyramidal octahedral Xe 4 Xe Square pyramidal Xe 4 Xe Square planar 74. Which of the following has longest bond length? (ree bond length in o is 1.18Å). (1) Ni() 4 () [o() 4 ] (3) [e() 4 ] (4) [Mn() 6 ] + Ans. (3) [e() 4 ] Since metal atom is carrying maximum ve charge therefore it would show maximum synergic bonding as sa resultant bond length would be maximum P E E log 0 = log P =1 14 P 10 atm 76. The addition of a catalyst during a chemical reaction alters which of the following quantities? (1) Entropy () nternal energy (3) Enthalpy (4) Activation energy P The addition of catalyst during a chemical reaction alters the activation energy. 77. The ionic radii of A + and B ions are m and m. The coordination number of each ion in AB is :- (1) 6 () 4 (3) 8 (4) radii ratio = r r radii ratio is in between to 0.73 so, coordination number is 6 15

6 APMT Which is the correct statement for the given acids? (1) Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid () Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid (3) Both are triprotic acids (4) Both are diprotic acids Phosphinic acid ( 3 P ) P Monoprotic Phosphonic acid ( 3 P 3 ) P Diprotic acid 79. og is colloidal solution of :- (1) Liquid in gas () Gas in liquid (3) Solid in gas (4) Gas in gas og is a colloidal solution of liquid in gas 80. Which of the following statement about the composition of the vapour over an ideal a 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 5. (Given : Vapour Pressure Data at 5, benzene = 1.8 kpa, Toluene = 3.85 kpa) (1) The vapour will contain a higher percentage of benzene () The vapour will contain a higher percentage of toluene (3) The vapour will contain equal amounts of benezene and toluene (4) Not enough information is given to make a predication A benzene, B toluene 1 : 1 molar mixture of A and B x A 1 and 1 xb P P 0 X P 0 X s A A B B 1 1 Ps kPa PA X A YA P 8.35 s Y 1 Y B A so, the vapour will contain higher percentage of benzene. 81. The correct statement regarding the comparison of staggered and eclipsed conformation of ethane, is :- (1) The staggered conformation of ethane is less stable than eclipsed conformation, because staggered conformation has torsional strain () The eclipsed conformation of ethane is more stable than staggered conformation, because eclipsed conformation has no torsional strain (3) The eclipsed conformation of ethane is more stable than staggered conformation even through the eclipsed conformation has torsional strain (4) The staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain. Staggered form * No torsional strain Eclipsed form 16

7 8. The reaction DE-P Na Na Me Me an be classified as :- is optically active due to (1) Williamson ether synthesis reaction () Alcohol formation reaction (3) Dehydration reaction (4) Williamson alcohol synthesis reaction This is an exmaple of Williamson ether syntehsis reaction in which sodium alkoxide reacts with alkyl halide and gives ether. 83. The product formed by the reaction of an aldehyde with a primary amine is :- (1) Schiff base () Ketone (3) arboxylic acid (4) Aromatic acid R Aldehyde + R' N + R N + primary amine Schiff base 84. Which of the following biphenyls is optically active? N (1) () R' absence of plane of symmetry and center of symmetry 85. or the following reactions :- (a) 3 + K (b) (c) 3 = +K K K Which of the following statements is correct? (1) (a) and (b) are elimination reaction and (c) is addition reaction () (a) is elimination, (b) is substitution and (c) is addition reaction (3) (a) is elimination, (b) and (c) are substitution reactions (4) (a) is substitution, (b) and (c) are addition reaction (a) 3 +K 3 = +K + breaking of bonds and formation of 1 bond so it is an example of elimination reaction. (b) K + K replacement of by is substitution reaction (3) 3 (c) + (4) breaking of 1 bond and formation of bonds is addition reaction 3 17

8 APMT At 100 the vapour pressure of a solution of 6.5g of a solute in 100 g water is 73 mm. f K b = 0.5, the boiling point of this solution will be :- 18 (1) 101 () 100 (3) 10 (4) P Ps n wsolute Msolvent 0 P N Msolute Wsolvent at 100, P 0 = 760 mm M 100 solute M solute = g mol 1 w 1000 solute T b = m K b = K M w b solute solvent T 1.06 b boiling point of solution = The correct statement regarding RNA and DNA, respectively is : (1) The sugar component in RNA is arabinose and the sugar component in DNA is '-deoxyribose. () The sugar component in RNA is ribose and the sugar component in DNA is '-deoxyribose. (3) The sugar component in RNA is arabinose (4) The sugar component in RNA is '-deoxyribose and the sugar component in DNA is arabinose. RNA Ribose Nucleic Acid DNA '-Deoxyribose Nucleic Acid 88. The correct statement regarding the basicity of arylamines is :- (1) Arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring electron system. () Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring electron system. (3) Arylamines are generally more basic than alkylamines because of aryl group. (4) Arylamines are generally more basic than alkylamines, because the nitrongen atom in arylamines is sp-hybridized. N Aryl amine R N alkyl amine * Delocalized lone pair of nitrogen * less basic 89. Which one given below is a non-reducing sugar? (1) Maltose () Lactose (3) Glucose (4) Sucrose N Aryl amine R N alkyl amine * Delocalized lone pair of nitrogen * less basic 90. The pair of electron in the given carbanion, 3 Θ, is present in which of the following orbitals? (1) p () sp 3 (3) sp (4) sp 3 No. of bp 1 & hybridisation is sp p 1