How will you distinguish between primary, secondary and tertiary amines ?

Explanation

Hinsberg.s test for amines : In this test, the amine is heated with benzene sulphonyl chloride `(C_(6)H_(5)SO_(2)Cl)` in the presence of excess of alkali.
Different amines gives different observations :
(a) Primary amines give clear solution which on acidification yields an insoluble material.
(b) Secondary amines give an insoluble substance which remains unaffected on addition of acid.
( c ) Tertiary amines do not react and remains insoluble in alkali and can be dissolved in acids.