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Azo dye is prepared by the coupling of phenol and which of the following compound?

Azo dye is prepared by the coupling of phenol and which of the following compound? Correct Answer Diazonium chloride

The most widely practiced reaction of diazonium salts is azo coupling. In this process, the diazonium compound is attacked by, i.e., coupled to, electron-rich substrates. When the coupling partners are arenes such as anilines and phenols, the process is an example of electrophilic aromatic substitution.

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