Question

Reaction at ${0-5}^{0}C$ between aniline, ${NaNO}_2$ and HCl is known as____________

• A. Suphonation of benzene
• B. Acylation of aniline
• C. Alkylation of aniline
• D. Diazotisation

Answer 1

The correct option is D Diazotisation

This is the diazotization reaction.

The reaction goes as follows :
$PhN{H}_2+NaN{O}_2+HCl\to Ph{N}_2^{+}C{l}^{-}$

The benzendiazonium salt thus formed acts as a synthetic intermediate and can be used to synthesize a wide variety of substituted benzene compounds.

For example,
$Ph{N}_2^{+}C{l}^{-}+CuCN\to PhCN$ (cyanobenzene)
$Ph{N}_2^{+}C{l}^{-}+CuI\left(KI\right)\to PhI$ (iodobenzene)

Option D is correct.