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Polymers · Question 21

AIPMT 2009MCQMedium📈 Topic in 12% papers+4−1
1

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]

Answer

(1) Neoprene : [figure]

Solution

As per NCERT, neoprene is formed by the free radical polymerisation of chloroprene (2-chloro-1,3-butadiene), CH2=C(Cl)-CH=CH2, so its repeating unit has only four carbon atoms:

[figure]

The structure given for neoprene has an extra CH2 group, so it is not correctly presented. The structures of terylene, nylon 6,6 and teflon are correct.

Answer: (1)

Out of syllabusAIPMT 2009

Keep practising — Polymers

2

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
3

Which one of the following polymers is prepared by condensation polymerisation?

  1. Teflon
  2. Natural rubber
  3. Polystyrene
  4. Nylon-6,6
Out of syllabusAIPMT 2007
4

[ NH(CH2)6NHCO(CH2)4CO ]n is a

  1. homopolymer
  2. copolymer
  3. addition polymer
  4. thermosetting polymer.
Out of syllabusAIPMT 2006
5

The monomer of the polymer [figure]

  1. [figure]
  2. CH3CH=CHCH3
  3. CH3CH=CH2
  4. (CH3)2C=C(CH3)2
Out of syllabusAIPMT 2005
6

Which one of the following is a chain growth polymer?

  1. Starch
  2. Nucleic acid
  3. Polystyrene
  4. Protein
Out of syllabusAIPMT 2004
7

Acrilan is a hard, horny and a high melting material. Which one of the following represents its structure?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Out of syllabusAIPMT 2003
8

Which one of the following monomers gives the polymer neoprene on polymerization?

  1. CH2=CHCl
  2. CCl2=CCl2
  3. [figure]
  4. CF2=CF2
Out of syllabusAIPMT 2003
9

Monomer of [figure] is

  1. 2-methylpropene
  2. styrene
  3. propylene
  4. ethene
Out of syllabusAIPMT 2002
10

Which of the following is not correctly matched?

  1. Neoprene : [figure]
  2. Nylon-6,6 : [figure]
  3. Terylene : [figure]
  4. PMMA : [figure]
Out of syllabusAIPMT 2001
11

CF2=CF2 is the monomer of

  1. teflon
  2. orlon
  3. polythene
  4. nylon-6
Out of syllabusAIPMT 2000

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