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  4. Acetamide on treatment with nitrous acid gives:

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Q. Acetamide on treatment with nitrous acid gives:

Amines

Solution:

Primary amides react with nitrous acid to form carboxylic acids with the evolution of nitrogen gas.
$\underset{\text{ Ethanamide}}{ CH_3CONH_2 } + HONO \rightarrow \underset{\text{ Ethanoic acid}}{CH_3COOH } + N_1 + H_2O $
In this reaction, nitrogen is eliminated quantitatively and its volume can be easily measured. Therefore, this reaction is used for the quantitative estimation of primary amides.