Question

# Aniline reacts with conc. $\;{\text{HN}}{{\text{O}}_{\text{3}}}$ to give:-

Hint: We must remember the reactivity of aniline. If we react to aniline with conc. $\;{\text{HN}}{{\text{O}}_{\text{3}}}$ we will get benzoquinone. Because concentrate nitric acid is a strong oxidising agent which oxidises the amine group into carbonyl compounds in benzene rings.

In the presence of concentrated nitric acid, aniline gets oxidised to give p-benzoquinone.

Generally in the presence of nitric acid and sulphuric acid, aniline forms anilinium nitrate as an intermediate product and forms azobenzene nitrate.
Hence, option C is the correct answer.
1. Aniline is a light brownish oily liquid with a musty and smells like the odour of a rotten fish. It is a flammable liquid and has an unpleasant odour. The compound is soluble in water. Aniline has a boiling point of $184^oC$ and melting point of about $-6^oC$ .
Aniline is a weak base. They react with strong acids to form anilinium (or phenylammonium) ion$\left( {{C_6}{H_5} - N{H_3}^ + } \right)$.