Alcohols and phenols can be differentiated by which reaction?
Correct answer: B. Halogenation
- A. Lucas test
- B. Halogenation
- C. Nitration
- D. Iodoform
Explanation
Phenols react with bromine water to give a white ppt. of 2,4,6-tribromophenol. Alcohols do not have any action with bromine water. Option D cannot be correct because not all alcohols give Iodoform test. It is limited to secondary alcohols and ethanol only.
This question appeared on the NUMS 2021 paper, which you can sit online with every answer explained.
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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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