(a) The reaction of benzenesulphonyl chloride with primary amine
yields N-ethylbenzenesulphonyl amide The hydrogen attached to nitrogen in sulphonamide is strongly
acidic due to the presence of strong electron withdrawing sulphonyl
group Hence, it is soluble in alkali (b) In the reaction with secondary amine, N,N-diethyl-
benzenesulphonamide is formed