Question

Differentiate between aniline and ethylamine?

Answer 1

Aniline and ethylamine can be distinguished by Azo dye test. Where, aniline on reaction with nitrous acid $HN{O}_2$ followed by the addition of alkaline 2-naphthol gives orange colored dye, while ethylamine with $HN{O}_2$ gives brisk effervescence due to the evolution of nitrogen gas.