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Polymers · Question 12

AIPMT 2014MCQEasy📈 Topic in 0% papers+4−1
1

Which of the following organic compounds polymerizes to form the polyester dacron?

  1. Propylene and para HO-(C6H4)-OH
  2. Benzoic acid and ethanol
  3. Terephthalic acid and ethylene glycol
  4. Benzoic acid and para HO-(C6H4)-OH

Answer

(3) Terephthalic acid and ethylene glycol

Solution

As per NCERT, Terylene or Dacron is the best known polyester. It is manufactured by heating a mixture of ethylene glycol and terephthalic acid at 420 to 460 K in the presence of zinc acetate–antimony trioxide catalyst.

n HOOC-C6H4-COOH + n HO-CH2-CH2-OH [ -OC-C6H4-COO-CH2-CH2-O- ]n + 2n H2O

∴ Dacron is formed from terephthalic acid and ethylene glycol.

Answer: (3)

Out of syllabusAIPMT 2014

Keep practising — Polymers

2

Which one of the following is an example of thermosetting polymer?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Out of syllabusAIPMT 2014
3

Nylon is an example of

  1. polyamide
  2. polythene
  3. polyester
  4. polysaccharide.
Out of syllabusNEET 2013
4

Which is the monomer of neoprene in the following?

  1. CH2= Cl |C-CH=CH2
  2. CH2=CH-C CH
  3. CH2=CH-CH=CH2
  4. CH2= CH3 |C-CH=CH2
Out of syllabusNEET 2013
5

Which one of the following sets forms the biodegradable polymer?

  1. CH2=CH-CN and CH2=CH-CH=CH2
  2. H2N-CH2-COOH and H2N-(CH2)5-COOH
  3. HO-CH2-CH2-OH and [figure]
  4. [figure] and CH2=CH-CH=CH2
Out of syllabusAIPMT 2012 (Mains)
6

Which one of the following is not a condensation polymer?

  1. Melamine
  2. Glyptal
  3. Dacron
  4. Neoprene
Out of syllabusAIPMT 2012 (Prelims)
7

Which of the following statements is false?

  1. Artificial silk is derived from cellulose.
  2. Nylon-6, 6 is an example of elastomer.
  3. The repeat unit in natural rubber is isoprene.
  4. Both starch and cellulose are polymers of glucose.
Out of syllabusAIPMT 2012 (Prelims)
8

Of the following which one is classified as polyester polymer?

  1. Terylene
  2. Bakelite
  3. Melamine
  4. Nylon-6,6
Out of syllabusAIPMT 2011 (Prelims)
9

Which of the following structures represents neoprene polymer?

  1. [-CH2- Cl |C=CH-CH2- ]n
  2. [-CH2- Cl |CH- ]n
  3. [-CH2- CN |CH- ]n
  4. [- C6H5 |CH-CH2- ]n
Out of syllabusAIPMT 2010 (Prelims)
10

Structures of some common polymers are given. Which one is not correctly presented?

  1. Neoprene : [figure]
  2. Terylene : [figure]
  3. Nylon 6,6 : [figure]
  4. Teflon : [figure]
Out of syllabusAIPMT 2009
11

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 makes rubber harder and stronger.
  4. Natural rubber has the trans-configuration at every double bond.
Out of syllabusAIPMT 2008

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