Question

In the preparation of p-nitro acetanilide from aniline, nitration is not done directly by nitrating mixture (a mixture of conc. H₂SO₄ and conc. HNO₃) because

(a) on nitration it gives o-nitro acetanilide

(b) it gives a mixture of o-and p-nito aniline

(c) - NH₂, group gets oxidised

(d) it forms a mixture of o-and p-nitro acetanilide

Answer 1

Correct option (c) - NH₂, group gets oxidised

Explanation:

The nitration of aniline is difficult to carry out with nitrating mixture, since -NH, group get oxidised which is not required. So, The amino group is first protected by acylation to form acetanilide which is then nitrated to give p-nitro acetanilide as a major product.