(1) Methyl amine (primary amine) reacts with benzene sulphonyl chloride to form N-methylbenzene sulphonamide.
(2) Dimethyl amine reacts with benzene sulphonyl chloride to give N, N – dimethylbenzene sulphonamide.
(3) Trimethyl amine does not react with benzene sulphonyl chloride and remains insoluble in KOH
