NEET2026ChemistryChapterActual
Observe the given reaction schemes for the synthesis of an aromatic compound X. Choose the correct option that correctly identifies X, Y, and Z.
Options
- AX = Phenol, Y = Propan-2-one, Z = Benzene diazonium chloride
- BX = Phenol, Y = Propanal, Z = Benzene diazonium chloride
- CX = Benzene, Y = Propan-2-one, Z = Chlorobenzene
- DX = Phenol, Y = Propan-2-one, Z = Nitrobenzene
Correct answer
A. X = Phenol, Y = Propan-2-one, Z = Benzene diazonium chloride
Step-by-step solution
In Scheme 1, the reaction shown is the commercial preparation of phenol from cumene. Cumene (isopropylbenzene) is first oxidized in the presence of air ( O₂ ) to form cumene hydroperoxide. This intermediate is then treated with dilute acid ( H₃O^+ ) to undergo rearrangement and cleavage, yielding phenol and acetone as a byproduct. Since Y is specified as a ketone, Y is acetone (propan-2-one) and X is phenol. In Scheme 2, aniline reacts with sodium nitrite ( NaNO₂ ) and hydrochloric acid ( HCl ) at low temperatures