Question

Complete the reaction

• A. $A\to$ Nitrobenzene $B\to$ p-bromonitrobenzene
• B. $A\to$ Benzene sulphonic acid $B\to$ Benzenesulphonic acid
• C. $A\to$ Nitrobenzene $B\to$ m-bromonitrobenzene
• D. $A\to$ Nitrobenzene $B\to$Trinitrobenzene

Answer 1

The correct option is C $A\to$ Nitrobenzene $B\to$ m-bromonitrobenzene

Ist reaction is Nitration: The replacement of H atom of a benzene ring by nitro group $\left(N{O}_2\right)$. It is carried out by treating benzene with conc. nitric acid and conc. sulfuric acid.
2nd reaction is bromination at p-position of nitrobenzene as this position is more electrophilic.