Question

Identify the final product formed when benzenamine reacts with the given reagents in the sequential order as: (i) $\mathrm{(CH_3CO)_2O}$/Pyridine, (ii) Conc. $\mathrm{HNO_3 + H_2SO_4}$ followed by $\mathrm{H_3O^+}$, (iii) $\mathrm{NaNO_2/HCl}$ (273 K) followed by $\mathrm{H_3PO_2(aq)}$.

• A. 2-Chloro-4-Nitrophenol
• B. Nitrobenzene
• C. 4-Nitrophenol
• D. 4-Chloro-2-Nitroaniline

Hint:

Important sequence to remember: \[ \mathrm{Aniline \rightarrow Diazonium\ Salt \xrightarrow{H_3PO_2} Benzene} \] Hypophosphorous acid removes the diazonium group and replaces it by hydrogen. This reaction is called deamination.

Answer 1

The Correct Option is B