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  4. Which one of the following forms an alcohol with nitrous acid?

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Q. Which one of the following forms an alcohol with nitrous acid?

COMEDKCOMEDK 2008Amines

Solution:

Aliphatic primary amines react with cold nitrous acid to give alcohols with the quantitative evolution of $N_2$ gas.
$\underset{\text{Ethylamine}}{C_2H_5NH_2}+ HONO \xrightarrow{273 -278\,K} \underset{\text{Ethanol }}{C_2H_5OH} + N_2 + H_2 O $