What is the name for orange azo dye which is formed by the reaction between benzene diazonium chloride and phenol?

p-Hydroxyazobenzene

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β

-Naphthylazobenzene

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p-Aminoazobenzene

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p-N, N-Dimethylaminoazobenzene

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Solution

The correct option is A p-Hydroxyazobenzene
The given structure below is an azo dye and is red in colour. It is p-Hydroxyazobenzene. It is formed in coupling reaction of phenol with benzene diazonium salt.

Hence, (a) is the correct option.

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Benzene diazonium chloride forms orange red dye with:

An azo compound is formed when benzene diazonium chloride reacts with:

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