Polymers PYQs Set 2 (PDF)

Set 2 of 6 · Questions 31-60 of 153

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Polymers · Set 2 (Q31-60)
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31. $The bakelite is prepared by the reaction between$ (1) $phenol and formaldehyde$ (2) $tetramethylene glycol$ (3) $urea and formaldehyde$ (4) $ethylene glycol. (1995)$ 32. $Match List-I and List-II. List-I A. Elastomeric polymer B. Fibre polymer C. Thermosetting polymer D. Thermoplastic polymer List-II I. Urea formaldehyde resin II. Polystyrene III. Polyester IV. Neoprene Choose the correct answer from the options given below;$ (1) $A-II, B-III, C-I, D-IV$ (2) $A-II, B-I, C-IV, D-III$ (3) $A-1V, B-III, C-I, D-II$ (4) $A-IV, B-I, C-III, D-II$ 33. $Which of the following polymer is used in the preparation of gaskets?$ (1) $[- C H_{2} - C H (C N) -]_{n}$ (2) $[- C H_{2} - C H (C_{6} H_{5}) -]_{n}$ (3) $[- C H_{2} - C H (C l) -]_{n}$ (4) $[- C F_{2} - C F_{2} -]_{n}$ 34. $Amongst the following, how many of them come under the category of elastomers? Natural rubber, polyethene, vulcanized rubber, bakelite, polyvinylchloride, Buna-N, Nylon 6, Neoprene$ (1) $4$ (2) $5$ (3) $3$ (4) $6$ 35. $Identify the correct statement from the following(A) Glyptal is made from the monomers ethylene glycol and phthalic acid(B) Bakelite is used in making electrical switches(C) Nylon2-nylon6 is a biodegradable polymer$ (1) $A, B, C$ (2) $A & C only$ (3) $A & B only$ (4) $B & C only$ 36. $Ziegler-Natta Catalyst is used in the manufacture of$ (1) $Polyacrylonitrile$ (2) $Terylene$ (3) $High density polythene$ (4) $Low density polythene$ 37. $Which one of the following is made by using step growth polymerisation?$ (1) $Nylon 6,6$ (2) $Teflon$ (3) $Rubber$ (4) $Neoprene$ 38. $Which of the following statements is not true?$ (1) $Step growth polymerization requires a bifunctional monomer.$ (2) $Nylon 6 is an example of step-growth polymerization.$ (3) $Chain growth polymerization includes both homopolymerisation and copolymerisation.$ (4) $Chain growth polymerization involves homopolymerisation only.$ 39. $Which among the following is not a polyester?$ (1) $Novolac$ (2) $PHBV$ (3) $Dacron$ (4) $Glyptal$ 40. $Which one of the following is NOT a copolymer ?$ (1) $Buna-S$ (2) $Neoprene$ (3) $PHBV$ (4) $Butadiene-styrene$ 41. $Which of the following polymer is used in the manufacture of wood laminates?$ (1) $cis -poly isoprene$ (2) $Melamine formaldehyde resin$ (3) $Urea formaldehyde resin$ (4) $Phenol and formaldehyde resin$ 42. $Which one of the following is not used as an initiator in ionic polymerisation?$ (1) $NaNH_{2}$ (2) $SnCl_{2}$ (3) $AlCl_{3}$ (4) $(C_{6} H_{5} CO)_{2} O_{2}$ 43. $Which of the following is an example for chain-growth polymer?$ (1) $Bakelite$ (2) $Teflon$ (3) $Nylon$ (4) $Terylene$ 44. $Identify condensation homopolymer from the following:$ (1) (2) (3) $[- C O - (C H_{2})_{5} - N H -]_{n}$ (4) $[- N H - (C H_{2})_{6} - N H - C O - (C H_{2})_{4} - C O -]_{n}$ 45. $Among celluose, poly vinyl chloride, nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is :$ (1) $Nylon$ (2) $Poly vinyl chloride$ (3) $Cellulose$ (4) $Natural Rubber$ 46. $Poly-β-hydroxybutyrate-co-β-hydroxyvalerate (PHBV) is a copolymer of$ (1) $3-hydroxybutanoic acid and 2-hydroxypentanoic acid$ (2) $3-hydroxybutanoic acid and 4-hydroxypentanoic acid$ (3) $2-hydroxybutanoic acid and 3-hydroxypentanoic acid$ (4) $3-hydroxybutanoic acid and 3-hydroxypentanoic acid$ 47. $The correct functional group X and the reagent/reaction conditions Y in the following scheme are condensation polymer$ (1) $X = C O O C H_{3}, Y = H_{2} /Ni/heat$ (2) $X = C O N H_{2}, Y = H_{2} Ni/heat$ (3) $X = C O N H_{2}, Y = B r_{2} /NaOH$ (4) $X = CN, Y = H_{2} /Ni/heat$ 48. $Preparation of Bakelite proceeds via reactions:$ (1) $Electrophilic substitution followed by condensation.$ (2) $Nucleophilic addition followed by dehydration.$ (3) $Electrophilic addition followed by dehydration$ (4) $Hydration followed by condensation.$ 49. $Which among the following polymers exhibit hydrogen bonding?$ (1) $Polyvinyl chloride$ (2) $Nylon-6, 6$ (3) $Neoprene$ (4) $Teflon$ 50. $Which one of the following statements is not true?.$ (1) $Buna‐S is a copolymer of butadiene and styrene.$ (2) $Natural rubber is a 1,4‐polymer of isoprene.$ (3) $In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger.$ (4) $Natural rubber has the trans‐ configuration at every double bond. (2008)$ 51. $Which of the polymer is used in the controlled release of drug?$ (1) (2) (3) (4) 52. $In which of the following chain termination step is absent?$ (1) $Polymerisation of C_{6} H_{5} CH = CH_{2} by RLi$ (2) $Polymerisation of C_{6} H_{5} CH = CH_{2} by BF_{3} and H_{2} O$ (3) $Polymerisations ofby (C_{6} H_{5} COO)_{2}$ (4) $Polymerisation of C_{6} H_{5} CH = CH_{2} by (C_{6} H_{5} COO)_{2}$ 53. $Terylene is a condensation polymer of ethylene glycol and$ (1) $salicylic acid$ (2) $phthalic acid$ (3) $benzoic acid$ (4) $terephthalic acid. (1999)$ 54. $Which one of the following structures represents nylon 6, 6 polymer?$ (1) (2) (3) (4) $(NEET‐II2016)$ 55. $Which one of the following is a chain growth polymer?$ (1) $Starch$ (2) $Nucleic acid$ (3) $Polystyrene$ (4) $Protein (2004)$ 56. $Identify the heteropolymer from the list given below :$ (1) $Polythene$ (2) $Nylon-6$ (3) $Teflon$ (4) $Nylon-6,6$ 57. $Which one of the following is a biodegradale polymer?$ (1) $[- N H - (C H_{2})_{6} - N H - C (= O) - (C H_{2})_{4} - C (= O) -]_{n}$ (2) $[- C (= O) - (C H_{2})_{5} - N H -]_{n}$ (3) $[- N H - C H_{2} - C (= O) - N H - (C H_{2})_{5} - C (= O) -]_{n}$ (4) 58. $Melamine polymer is formed by the condensation of:$ (1) (2) (3) (4) 59. $Which one of the following polymers is prepared by condensation polymerisation?.$ (1) $Teflon$ (2) $Natural rubber$ (3) $Styrene$ (4) $Nylon‐6,6(2007)$ 60. $The Novolac polymer has mass of 963 g. The number of monomer units present in it are$