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

NEET levelSingle correct optionDifficulty 1 of 3si137

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

Aniline gives benzenediazonium chloride (A). In the Sandmeyer reaction

CuCN

replaces the diazonium group by

- CN

, giving

C X_{6} H X_{5} CN

(benzonitrile). The isocyanide is formed by the carbylamine reaction, not here.