Primary, secondary and tertiary amines can be distinguished by

Options

A. Schiff's test
B. Fehling's test
C. Tollen's test
D. Hinsberg's test.

Answer

D

Explanation

Mixture of `1^(@), 2^(@)` and `3^(@)` amines can be distinguished by Hinsberg's method. In Hinsberg's method benzene sulphonyl chlotide `C_(6)H_(5)SO_(2)Cl` (Hinsberg's reagent) is used. `1^(@)` and `2^(@)` amines reacts to give sulphonamide derivatives with loss of HCl, whereas `3^(@)` amines do not give any isolable products other than the starting amine. In the latter case a quanternary ammonium salt may be as an intermediate, but this rapidly breaks down in water to liberate the original `3^(@)` amine.