question_answer

Which of the following compounds on treatment first with \[NaN{{O}_{2}}/HCl\] and then coupled     with     phenol     produces p-hydroxyazobenzene?

A)  Nitrobenzene                  

B)  Azobenzene

C)  Phenol                                

D)   Aniline

Correct Answer: D

Solution :

Key Idea: \[{{1}^{o}}\]aromatic amine on reaction with \[NaN{{O}_{2}}/HCl\] and phenol produce orange coloured dye which is \[p-\]hydroxy azobenzene. \[\therefore \][d] is correct answer.