Aniline is treated with NaNO2/HCl at 273 K to give A, which is warmed with CuCN to give B. B is

NEET levelSingle correct optionDifficulty 1 of 3si173

Aniline is treated with $NaNO X_{2} / HCl$ at 273 K to give A, which is warmed with $CuCN$ to give B. B is

Diazotisation gives benzenediazonium chloride (A). The Sandmeyer reaction with

CuCN

replaces the diazonium group by

- CN

to give benzonitrile.