Question
In the following reaction, condition 'A' is -
MHT CET
Chemistry
Alcohols Phenols and Ethers
2026
MHT CET 2026 (20 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Reduction with Zinc dust
- B. Dehydration with H _2 SO _4 / 443 K
- C. Treatment with CS _2 / low temperture
- D. Oxidation with CrO _3
Answer
D. Oxidation with CrO _3
Step-by-step solution
The given reaction shows the conversion of phenol to p-benzoquinone. This transformation is an oxidation reaction. Phenol is oxidized to p-benzoquinone by strong oxidizing agents such as chromic acid ( Na _2 Cr _2 O _7 with H _2 SO _4 or CrO _3). In contrast, reduction with zinc dust converts phenol to benzene, and CS _2 at low temperature is used as a solvent for monohalogenation of phenol. Hence, condition 'A' is oxidation with CrO _3. Answer: Oxidation with CrO _3
Related: Chemistry — Alcohols Phenols and Ethers · All PYQ Banks