(i) Benzene sulphonyl chloride - (b) Hinsberg reagent

(ii) Sulphanilic acid - (a) Zwitter ion

(iii) Alkyl diazonium salts - (d) Conversion to alcohols

(iv) Aryl diazonium salts - (c) Dyes

(i) Benzene sulphonyl chloride - (b) Hinsberg reagent

Benzenesulphonyl chloride or, C₆H₅SOCl is commonly known as Hinsberg’s reagent. Hinsberg’s reagent can be used to distinguish primary, secondary and tertiary amines.

(ii) Sulphanilic acid - (a) Zwitter ion

The net charge on sulphanilic acid is zero. Therefore, Sulphanilic acid is a zwitter ion or dipolar ion.

(iii) Alkyl diazonium salts - (d) Conversion to alcohols

When alkyl diazonium salts are treated with water molecules, they are converted to alcohols.

(iv) Aryl diazonium salts - (c) Dyes