An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with Bromine and KOH forms a compound ‘C’ of molecular formula C6H7N. Write the structures and IUPAC names of compounds A, B, and C.

Compound ‘C,’ with the molecular formula C₆H₇N, is created by heating compound ‘B’ with Br₂ and KOH, according to the formula. This is a decomposition of Hoffmann bromamide. As a result, compound B is an amide, whereas compound C is an amine. Aniline is the only amine with the chemical formula C₆H₇N. (C₆H₅NH₂).

Therefore, compound ‘ B ’ (from which ’ C ’ is formed) must be benzamide, (C₆ H₅ CO NH₂).

Further, benzamide is formed by heating compound ‘A’ with aqueous ammonia.

Therefore, compound ‘A’ must be benzoic acid.

The given reactions can be explained with the help of the following equations :