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Polymers · Question 2

NEET (UG) 2022MCQEasy📈 Topic in 25% papers+4−1
1

Which statement regarding polymers is not correct?

  1. Elastomers have polymer chains held together by weak intermolecular forces
  2. Fibers possess high tensile strength
  3. Thermoplastic polymers are capable of repeatedly softening and hardening on heating and cooling respectively
  4. Thermosetting polymers are reusable

Answer

(4) Thermosetting polymers are reusable

Solution

As per NCERT:

Elastomers are rubber-like solids whose chains are held together by the weakest intermolecular forces (correct).

Fibres have strong intermolecular forces such as hydrogen bonds, giving high tensile strength (correct).

Thermoplastics are linear or slightly branched polymers that soften on heating and harden on cooling repeatedly (correct).

Thermosetting polymers are cross-linked or heavily branched; on heating they undergo extensive cross-linking in moulds and become infusible. These cannot be reused.

Statement (4) is not correct.

Answer: (4)

Out of syllabusNEET (UG) 2022

Keep practising — Polymers

2

Which among the following is a thermoplastic polymer?

  1. Melamine polymer
  2. Bakelite
  3. Polythene
  4. Urea-formaldehyde resin
Out of syllabusNEET (UG) 2022 (Phase 2)
3

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

  1. Dacron
  2. Teflon
  3. Nylon-66
  4. Novolac
Out of syllabusNEET (UG) 2021
4

Which of the following is a natural polymer?

  1. poly (Butadiene-styrene)
  2. polybutadiene
  3. poly (Butadiene-acrylonitrile)
  4. cis-1,4-polyisoprene
Out of syllabusNEET (UG) 2020
5

The biodegradable polymer is :

  1. nylon-6
  2. Buna-S
  3. nylon-6, 6
  4. nylon-2-nylon 6
Out of syllabusNEET (UG) 2019
6

Regarding cross-linked or network polymers, which of the following statements is incorrect?

  1. They contain covalent bonds between various linear polymer chains.
  2. They are formed from bi- and tri-functional monomers.
  3. Examples are bakelite and melamine.
  4. They contain strong covalent bonds in their polymer chains.
Out of syllabusNEET 2018
7

Natural rubber has

  1. alternate cis- and trans-configuration
  2. random cis- and trans-configuration
  3. all cis-configuration
  4. all trans-configuration.
Out of syllabusNEET 2016 (Phase 1)
8

Which one of the following structures represents nylon 6, 6 polymer?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Out of syllabusNEET 2016 (Phase 2)
9

Caprolactam is used for the manufacture of

  1. teflon
  2. terylene
  3. nylon 6, 6
  4. nylon 6
Out of syllabusAIPMT 2015
10

Biodegradable polymer which can be produced from glycine and aminocaproic acid is

  1. buna - N
  2. nylon 6, 6
  3. nylon 2-nylon 6
  4. PHBV
Out of syllabusAIPMT 2015 (Cancelled)
11

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
Out of syllabusAIPMT 2014

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