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Discussion

Match the following :

(a) Neoprene(i) Ethyleneglycol and phthalic acid
(b) Buna-N(ii) Phenol and formaldehyde
(c) Glyptal(iii) Chloroprene
(d) Bakelite(iv) 1,3-Butadiene and acrylonitrile

  • A.(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
  • B.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  • C.(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  • D.(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

Answer: A

The correct matching is (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii).

  1. Neoprene is a polymer of chloroprene (2-chloro-1,3-butadiene).
  2. Buna-N is a copolymer of 1,3-butadiene and acrylonitrile.
  3. Glyptal is a polyester of ethylene glycol and phthalic acid.
  4. Bakelite is a condensation polymer of phenol and formaldehyde.

Option B swaps glyptal and bakelite, and options C and D give neoprene the butadiene-acrylonitrile pair that belongs to Buna-N.

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