Question

Liebermann's nitroso test

Answer 1

Liebermann's nitroso test is a qualitative test used for the identification of secondary amines.

Answer 2

Liebermann's nitroso test identifies secondary amines. The secondary amine reacts with nitrous acid ($HONO$) to form an N-nitrosamine. This N-nitrosamine is then treated with phenol and concentrated sulfuric acid, resulting in a characteristic color change (e.g., green to blue/violet) for a positive result.