A substance formed by reduction of phenol with Zn is?
Correct answer: B. Benzene
- A. Picric acid
- B. Benzene
- C. Cresol
- D. Carbolic acid
Explanation
Option B is correct as Phenol gives out a proton and forms phenoxy anion. This anion later gives out oxygen radical to form a phenyl-free radical. On the other hand, zincreacts with the oxygen radicals to form Zinc Oxide (ZnO). Finally, hydrogen free radical (formed from hydrogen ion) joins with phenyl-free radical to form "Benzene".
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About Phenols
Phenols contain a hydroxyl group directly bonded to an aromatic ring, making them more acidic than alcohols because the phenoxide ion is resonance-stabilised. Reactions include ionisation with bases, electrophilic substitution, bromination, nitration and oxidation, with attention to the difference between phenols and aliphatic alcohols.
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535 free Alcohols and Phenols MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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