Question

Give example of compound which will give red colour dye when treated with enough for hcl followed by alkaline beta naphthol

Answer 1

Answer:

Sodium Nitrite

Explanation:

Aniline reacts with sodium nitrite in the presence of hydrochloric acid forms benzene diazonium chloride. Further benzene diazonium chloride reacts with 2-naphthol forms a bright orange colour 2-naphthol aniline dye. Azo compounds are prepared by the reaction of diazonium salts with phenol under alkaline conditions.