Polymers PYQs Set 3 (PDF)

Set 3 of 6 · Questions 61-90 of 153

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Polymers · Set 3 (Q61-90)
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61. $Structures of some common polymers are given. Which one is not correctly presented?.$ (1) $Neoprene-$ (2) $Terylene$ (3) $Nylon 6,6‐$ (4) $Teflon‐ (2009)$ 62. $Which of the following is a polyamide ?$ (1) $Bakelite$ (2) $Terylene$ (3) $Nylon-6,6$ (4) $Teflon$ 63. $is a$ (1) $homopolymer$ (2) $copolymer$ (3) $addition polymer$ (4) $thermosetting polymer. (2006)$ 64. $Assertion : Rayon is a semisynthetic polymer whose properties are better than natural cotton. Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation.$ (1) $Both assertion and reason are correct, and the reason is the correct explanation for the assertion.$ (2) $Both assertion and reason are incorrect.$ (3) $Assertion is incorrect statement, but the reason is correct.$ (4) $Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.$ 65. $Which polymer has chiral monomer(s) ?$ (1) $Buna- N$ (2) $PHBV$ (3) $Neoprene$ (4) $Nylon 6,6$ 66. $In anionic polymerisation, the compound which acts as effective chain initiator is$ (1) $BF_{3}$ (2) $(CH_{3} CO)_{2} O_{2}$ (3) $SnCl_{2}$ (4) $R - Li$ 67. $Complete hydrolysis of cellulose gives$ (1) $D-fructose$ (2) $D-ribose$ (3) $D-glucose$ (4) $L-glucose$ 68. $Match List I with List II: List-I List-II Polymer used for items A. Nylon 6,6 I. Buckets B. Low density Polythene II. Non-stick utensils C. High density Polythene III. Bristles of brushes D. Teflon IV. Toys Choose the correct answer from the options given below:$ (1) $A-III, B-I, C-IV, D-II$ (2) $A-III, B-IV, C-I, D-II$ (3) $A-II, B-I, C-IV, D-III$ (4) $A-II, B-IV, C-I, D-III$ 69. $Nylon threads are made up of$ (1) $Polyvinyl polymer$ (2) $Polyester polymer$ (3) $Polyamide polymer$ (4) $Polyethylene polymer$ 70. $The poly dispersity index (PDI) of a polymer is (M_{w} = weight average molecular mass and M_{n} = number average molecular mass)$ (1) $the product of M_{n} and M_{w}$ (2) $the sum of M_{n} and M_{w}$ (3) $the difference between M_{w} and M_{n}$ (4) $the ratio between M_{w} and M_{n}$ 71. $The two monomers used in the preparation of dextron are$ (1) $3-hydroxybutanoic acid and 3-hydroxypentanoic acid$ (2) $E-aminocaproic acid and glycine$ (3) $isobutylene and isoprene$ (4) $lactic acid and glycolic acid.$ 72. $Which polymer is used in the manufacture of paints and lacquers ?$ (1) $Bakelite$ (2) $Glyptal$ (3) $Polypropene$ (4) $Poly vinyl chloride$ 73. $Bakelite is obtained from phenol by reacting with$ (1) $C H_{3} CHO$ (2) $C H_{3} C O C H_{3}$ (3) $HCHO$ (4) $(C H_{2} O H)_{2}$ 74. $Which polymer among the following polymers does not soften on heating?$ (1) $Bakelite$ (2) $Polythene$ (3) $Polystyrene$ (4) $PVC$ 75. $Bakelite is a cross-linked polymer of formaldehyde and:$ (1) $PHBV$ (2) $Buna-S$ (3) $Novolac$ (4) $Dacron$ 76. $The polymer containing strong intermolecular forces e.g. hydrogen bonding is$ (1) $Teflon$ (2) $nylon-6,6$ (3) $polystyrene$ (4) $natural rubber$ 77. $What is the molecular formula of a monomer used for preparation of teflon?$ (1) $C_{2} H_{2}$ (2) $C_{2} H_{4}$ (3) $C_{2} H_{3} CN$ (4) $C_{2} F_{4}$ 78. $Acrilan is a hard, horny and a high melting material. Which one of the following represents its structure?.$ (1) $(- C H_{2} - C H (C N) -)_{n}$ (2) $(- C H_{2} - C (C H_{3}) (C O O C H_{3}) -)_{n}$ (3) $(- C H_{2} - C H (C O O C_{2} H_{5}) -)_{n}$ (4) $(2003)$ 79. $Which of the following is not an example of a condensation polymer?$ (1) $Nylon 6,6$ (2) $Decron$ (3) $Buna-N$ (4) $Silicone$ 80. $Which of the following is an addition polymer?$ (1) $Terylene$ (2) $Nylon-6,6$ (3) $Polyester$ (4) $Neoprene$ 81. $Which of the following polymer is formed due to the co-polymerisation of 1,3-butadiene and phenylethene?$ (1) $Buna-N$ (2) $Neoprene$ (3) $Novalac$ (4) $Buna-S$ 82. $Which one is classified as a condensation polymer ?$ (1) $Dacron$ (2) $Neoprene$ (3) $Teflon$ (4) $Acrylonitrile$ 83. $Identify the polymer obtained from and CN$ (1) $Polyacrylamide$ (2) $Buna N$ (3) $Glyptal$ (4) $Perspex$ 84. $The monomers used in preparation of dextron are$ (1) $lactic acid and glycolic acid$ (2) $3-hydroxybutanoic acid and 3-hydroxypentanoic acid$ (3) $styrene and 1,3-butadiene$ (4) $hexamethylenediamine and adipic acid.$ 85. $Which ofthe following structures represents neoprene polymer?.$ (1) $(- C H_{2} - C (C l) = C H - C H_{2} -)_{n}$ (2) $(- C H_{2} - C H (C l) -)_{n}$ (3) $(- C H_{2} - C H (C N) -)_{n}$ (4) $(2010)$ 86. $The homopolymer formed from 4-hydroxy-butanoic acid is:$ (1) $(- C (= O) - (C H_{2})_{2} - C (= O) -)_{n}$ (2) $(- C (= O) - (C H_{2})_{2} - C (= O) - O -)_{n}$ (3) $(- O - C (= O) - (C H_{2})_{3} - O -)_{n}$ (4) $(- C (= O) - (C H_{2})_{3} - O -)_{n}$ 87. $Buna-N synthetic rubber is a copolymer of :$ (1) $H_{2} C = CH - CH = C H_{2} and H_{5} C_{6} - CH = C H_{2}$ (2) $H_{2} C = CH - CN and H_{2} C = CH - CH = C H_{2}$ (3) $H_{2} C = CH - CN and H_{2} C = CH - C H_{3} C = C H_{2}$ (4) $H_{2} C = CH - Cl C = C H_{2} and H_{2} C = CH - CH = C H_{2}$ 88. $Monomers are converted to polymers by$ (1) $Hydrolysis of monomer$ (2) $Condensation between monomers$ (3) $Protonation of monomers$ (4) $none$ 89. $The total number of lone-pairs of electrons in melamine is$ 90. $Among the following no. of condenstion polymer Nylon-6, Buna-N, Buna-S, Nylon-6,6, Nylon-6,10, PVC, Polystyrene, Teflon.$