Treatment of benzene diazonium chloride with sodium sulphide forms – phenyl hydrazine chloride

Treatment of benzene diazonium chloride with sodium sulphide forms?

(a) Chlorobenzene

(b) Phenol

(c) benzene

(d) Phenyl hydrazine chloride

Solution:

Answer – the correct option is d.

Benzene Diazonium Chloride Reaction –

Azo C -Coupling reaction with phenol

When benzene diazonium chloride react with phenol then it make azo component, it is yellow product, this is called yellow azo dyes. this dyes is mainly used for dyeing of textile materials. such as cotton goods.

Coupling reaction with aniline

Aniline solution is react with same benzene diazonium chloride then it is given yellow product. this product is called yellow azo color or yellow azo dyes. this types of dyes is used for colouration of textile materials azo dye test is carried out for determine the value of aromatic amines (aniline). Aniline is an aromatic amine and after benzene diazonium chloride react with aniline it gives yellowish or orange azo dyes.

Coupling reaction with beta naphthol

When beta naphthol or 2 – naphthol (naphthalene + alcohol = beta naphthol) is react with benzene diazonium chloride then it make azo component. this is called red colour azo dyes.

Azo N – Coupling reaction with aniline

In this coupling reaction, aniline is directly reacted with benzene diazonium chloride and with maintain pH – > 7. then it make an azo Component or azo dye.


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