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Q.
Reaction of aniline with $NaNO_{2}$ +dill HCl at $0^{\circ}C$ followed by reaction with $CuCN$ yields
KVPYKVPY 2015
Solution:
Reaction of aniline with $NaNO_{2} +$ dil. $HCl$ at $0^{\circ}C$ gives benzene diazonium salt, which then reacts with $CuCN$ to give cyanobenzene with the evolution of $N_{2}$ gas.
