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Polymers

AIPMT 2014MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2014

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

Answer

(4) [figure]

Solution

As per NCERT, thermosetting polymers are cross-linked or heavily branched molecules which, on heating, undergo extensive cross-linking in moulds and become infusible; they cannot be reused. Some common examples are bakelite and urea-formaldehyde resins.

⇒ (1) is neoprene (polychloroprene), an elastomer.

⇒ (2) is polyvinyl chloride (PVC), a thermoplastic polymer.

⇒ (3) is nylon 6,6, a fibre.

⇒ (4) is the phenol–formaldehyde polymer (novolac), which on heating with formaldehyde forms the cross-linked thermosetting polymer bakelite.

∴ The thermosetting polymer is the phenol–formaldehyde polymer (bakelite).

Answer: (4)

Out of syllabus

Keep practising — Polymers

Ques. 2NEET 2013

Nylon is an example of

  1. polyamide
  2. polythene
  3. polyester
  4. polysaccharide.
Out of syllabus
Ques. 3NEET 2013

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 syllabus
Ques. 4AIPMT 2012 (Mains)

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 syllabus
Ques. 5AIPMT 2012 (Prelims)

Which one of the following is not a condensation polymer?

  1. Melamine
  2. Glyptal
  3. Dacron
  4. Neoprene
Out of syllabus
Ques. 6AIPMT 2012 (Prelims)

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 syllabus
Ques. 7AIPMT 2011 (Prelims)

Of the following which one is classified as polyester polymer?

  1. Terylene
  2. Bakelite
  3. Melamine
  4. Nylon-6,6
Out of syllabus
Ques. 8AIPMT 2010 (Prelims)

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 syllabus
Ques. 9AIPMT 2009

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 syllabus
Ques. 10AIPMT 2008

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 syllabus
Ques. 11AIPMT 2007

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

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

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