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JEE Main levelSingle correct optionDifficulty 2 of 3pl218

Which one of the following rubbers contains nitrogen?

ANatural rubber
BBuna-S
CBuna-N
DNeoprene

Answer: C

Buna-N contains acrylonitrile units,

- CH X_{2} - CH (CN) X^{-}

. Buna-S, neoprene (contains Cl) and natural rubber have no nitrogen.

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