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JEE Main 2025 Jan 23 Shift 2, Chemistry Q17: Preparation of Phenol

JEE Main2025Jan 23, Shift 2Chemistry
Q.

Identify the products [A] and [B], respectively in the following reaction :

  1. A
  2. B
  3. C
  4. D
Solution

The high temperature and pressure with NaOH followed by acidification is the classical Dow process: chlorobenzene is converted to sodium phenoxide and then to phenol on acid work-up. So [A] is phenol.

Phenol on oxidation with sodium dichromate in sulfuric acid is converted to 1,4-benzoquinone (para-benzoquinone). So [B] is para-benzoquinone.

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