How  are  azo-dyes obtained?

Asked by Topperlearning User | 28th Mar, 2014, 09:11: AM

Expert Answer:

Benzenediazonium salts condense with phenol in slightly alkaline medium at 273-278 K giving coloured substance called azo-dyes. This reaction is called coupling reaction.

Answered by  | 28th Mar, 2014, 11:11: AM