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JEE Main levelSingle correct optionDifficulty 2 of 3hx025

Bromoethane is warmed with $AgCN$ in ethanol. The main organic product is

A $CH X_{3} CH X_{2} - NC$
B $CH X_{3} CH X_{2} - OH$
C $CH X_{3} CH X_{2} - CN$
D $CH X_{3} CH X_{2} - NH X_{2}$

Answer: A

CN X^{-}

is ambident.

AgCN

is predominantly covalent, so the nitrogen lone pair attacks the carbon and the isocyanide

\ce{CH3CH2-N+#C-}

forms. Alkali-metal cyanides (

KCN

) give the nitrile.

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