Question

How can 1°-, 2º- and 3°-amines be
distinguished with the help of HNO2 acid​

Answer 1

Explanation:

Primary amine

1. With nitrous acid it forms primary alcohol

With chloroform and KOH it forms carbylamine No reaction with CHCl

3

and KOH No reaction with CHCl

3

and KOH

3. With CS

2

and HgCl it forms alkyl isothiocyanate (mustard oil) No reaction with CS

2

and HgCl

2

No reaction with CS

2

and HgCl

2

4. With diethyl oxalate, it forms solid dialkyl oxamide at room temperature