Question

Hinsberg reagent is used to distinguish:

• A. Amines
• B. Alcohols
• C. Acids
• D. Amides

Answer 1

The correct option is A Amines

Benzenesulphonyl chloride$\left(C_6{H}_{5}S{O}_{2}Cl\right)$ is used to distinguish amines which is also known as Hinsberg's reagent.
i). Reaction with $1^o$ amine produces alkali soluble N-alkylbenxene sulphonyl amide.

ii) Reaction with $2^o$ amine produces alkali insoluble N,N-dialkyllbenzene sulphonamide.

iii) $3^o$ amines do not react with Hinsberg's reagent.