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Write the chemical equation for the following.
What happens when benzene diazonium chloride reacts with phenol in weak alkaline medium? (Give…
What happens when benzene diazonium chloride reacts with phenol in weak alkaline medium? (Give balanced equation).
Answer
Answer
AIEquation: $\mathrm{C_{6}H_{5}N_{2}Cl} + \mathrm{C_{6}H_{5}OH} \xrightarrow{\text{NaOH}\text{ }\text{(weak}\text{ }\text{alkaline)}\text{,}\text{ }\text{273-278}\text{ }\text{K}} \mathrm{C_{6}H_{5}N=NC_{6}H_{4}OH} + \mathrm{HCl}$
Reaction: Coupling reaction
Product: 4-hydroxyazobenzene (p-hydroxyazobenzene)
Benzenediazonium chloride couples with phenol at the para position to give p-hydroxyazobenzene, an orange azo dye.
From ISC 2018 Chemistry Paper 1, question 14(c).
Check your working with the Chemical equation balancer: balance any equation, ionic and redox ones too, with the atom count on each side.