1.

Dye test can be used to distinguish

Answer»

ETHYLAMINE and acetamide
Ethylamine and aniline
Urea and acetamide
Methylamine and ethylamine

SOLUTION :Dye test is given by aromatic PRIMARY amines and not by aliphatic amines.
Aniline gives diazonium chloride with `HNO_(2)(NaNO_(2)//HCl)` at `0^(@)C` which form coloured dye with PHENOLS. This is dye-tesopt. Aliphatic amines form alcohol with evolution of `N_(2)` on treating with `HNO_(2)`.


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