Question

An amine ‘X’ reacts with Hinsberg reagent and the product obtained is insoluble in alkali. The amine ‘X’ is:

• A. (CH$_3$)$_2$–NH
• B. (CH$_3$)$_3$N
• C. CH$_3$–CH$_2$–NH$_2$
• D. \chemfig{*6(=-=-=-)-NH_2} (Aniline)

Hint:

Hinsberg test: Primary amine → soluble sulfonamide; secondary → insoluble; tertiary → no reaction.

Answer 1

The Correct Option is A

The reaction of a secondary amine with Hinsberg reagent yields a sulfonamide insoluble in alkali, thus verifying that ‘X’ is a secondary amine.