The hydrogenation of phenol in the presence of Ni and heat gives_________________?
Correct answer: D. cyclohexanol
- A. cyclohexane
- B. n - hexane
- C. 1 - hexanol
- D. cyclohexanol
Explanation
Hydrogenation saturates both the aromatic ring and the phenolic system under catalytic conditions with nickel and heat, producing cyclohexanol. Cyclohexane would require removal or hydrogenolysis of the hydroxyl group as well, so it is not the expected product.
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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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