Azo dye is prepared by the coupling of phenol and:

Yellow dye can be prepared by a coupling reaction of benzene diazonium chloride in acid medium with x. Identify X from the following

Yellow dye can be prepared by a coupling reaction of benzene diamonium chloride in acid medium with X. Identify X from the following .

Yellow dye can be prepared by a coupling reaction of benzene diazonium chloride in acid medium with x. Identify X from the following

Azo-dyes are prepared from:

Azo-dyes are prepared from:

Azo dye test is given by