Question

Primary, secondary and teritary amines can be separated using

• A. Acetyl amide
• B. Benzene sulphonic acid
• C. para-Toluenesulphonyl chloride
• D. Chloroform and KOH

Answer 1

The correct option is C para-Toluenesulphonyl chloride

Hinsberg'st test is used to distinguish between primary, secondary and tertiary amines.
Benzyl sulphonyl chloride is used in Hinsberg's test. Nowadays, p-toluenesulphonyl chloride is used at the place of benzylsulphonyl chloride.

Sulphonamides formed from primary amine is soluble in alkali.
Sulphonamides formed from secondary amine is insoluble in alkali.
Sulphonamides are not formed by tertiary amines. So it is the best reagent to distinguish all the three types of amines.

Hence, option (a) is correct.