Question

How will you distinguish between primary, secondary and tertiary amines by Hinsberg’s test? 

Answer 1

With Hinsberg’s reagent:
Primary amines give N-alkyl benzene sulphonamide soluble in alkali.
Secondary amines give N, N-dialkyl benzene sulphonamide insoluble in alkali.
Tertiary amines have no action with Hinsberg’s reagent.