Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg’s reagent is ________.
Aniline, N-Methylaniline, Methanamine, N, N-Dimethylmethanamine, N-Methyl methanamine, Phenylmethanamine, N-propylaniline, N-phenylaniline, N, N-Dimethylaniline, Allyl amine, Isopropyl amine [2026]
(2)