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Q.

Dye test can be used to distinguish

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a

Ethylamine and acetamide

b

Ethylamine and aniline

c

Urea and acetamide

d

Methylamine and ethylamine

answer is B.

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Detailed Solution

Dye test is given by aromatic primary amines and not by aliphatic amines. Aniline gives diazonium chloride with

HNO2(NaNO2)HCI at 0°C which form coloured dye with phenols. Aliphatic amines form alcohol with evolution of N2 on treating with HNO2

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