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One mole of p-bromo benzyl bromide reacts with excess KCN(alc) to give a product. Number cyanide groups present per molecule of the product will be

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answer is B.

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Detailed Solution

${Br}^{-}$ attached to Benzene ring cannot be replaced by cyanide ion because C–Br acquires double bond character due to resonance.

4-Bromobenzyl Cyanide 16532-79-9 | Tokyo Chemical Industry Co., Ltd.(JP)

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