Isopropylbenzene is oxidized in the presence of air followed by treatment with dilute acid to yield an aromatic compound Y and an aliphatic compound Z. When compound Y is treated with concentrated nitric acid, it forms a product W. The product W is:

Step-by-step solution

Isopropylbenzene (cumene) is oxidized in the presence of air to form cumene hydroperoxide, which upon treatment with dilute acid yields phenol (aromatic compound Y) and acetone (aliphatic compound Z). When phenol is treated with concentrated nitric acid, it undergoes electrophilic aromatic substitution at all ortho and para positions to form 2,4,6-trinitrophenol (picric acid) as the product W. Using dilute nitric acid would yield a mixture of o -nitrophenol and p -nitrophenol, whereas concentrated nitric acid yield