question_answer

Which gives only mono substituted product?

A)  \[o-\]dinitrobenzene

B)  \[m-\]dinitrobenzene

C)  \[p-\]dinitrobenzene

D)  Nitrobenzene

Correct Answer: B

Solution :

Nitro group is meta directing group From these structures, it is clear that only \[m-\]dinitrobenzene gives mono-substituted product because only \[m-\]position is possible in \[m-\]dinitrobenzene.