JEE Main · 2022 · 27 Jun 2022 · Shift 2 · Polymers

Which is true about Buna-N?

(A)It is a linear polymer of 1, 3-butadiene.
(B)It is obtained by copolymerization of 1, 3-butadiene and styrene.
(C)It is obtained by copolymerization of 1, 3-butadiene and acrylonitrile.✓ Correct
(D)The suffix N in Buna-N stands for its natural occurrence

Answer: (C)

Solution

Buna-N is a synthetic rubber obtained by copolymerization of 1,3-butadiene and acrylonitrile (CH₂=CH-CN). The 'N' in Buna-N stands for the nitrile group (-CN) present in acrylonitrile, not for natural occurrence. This copolymer is oil-resistant and used in applications requiring resistance to oils and fuels.

Answer: (C)

JEE Main · 2022 · 27 Jun 2022 · Shift 2 · Single correct option

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