question_answer

A compound with nitro group was reduced by \[Sn/HCl,\]followed by treatment with \[NaN{{O}_{2}}/HCl\]and followed by phenol. The chromophore group in the final compound is

A)  \[N{{O}_{2}}\]group      

B) \[N{{H}_{2}}\]group

C)  azo group      

D)  OH group

Correct Answer: C

Solution :

 The chromophore group in the final compound is azo group\[(-N=N-)\]