Question

Name one chemical reaction to distinguish between aniline and methanamine?

Answer 1

Aniline gives positive test for coupling reaction.
Aniline reacts with benzene diazonium chloride in basic medium to give p-aminoazobenzene which is yellow in colour
Ethylamine  does not give  coupling reaction.
Methylamine and dimethylamine :
Methylamine is a primary amine hence it give carbylamine test. Dimethylamine being a secondary amine will not give
carbylamine test.