Which statement is incorrect about phenol:
Correct answer: C. It liberates CO2 gas from carbonate
- A. It is colourless, crystalline poisonous solid
- B. It does not turn blue litmus paper red
- C. It liberates CO2 gas from carbonate
- D. Above 65.9°C it is miscible wither water
Explanation
Phenol is much more acidic than alcohols but less acidic than carboxylic acids. It dissolves readily in alkalies but it is too weak to affect the litmus paper or to evolve CO2 from carbonates. Its dissociation constant (Ka ) is 1.3xl0-10
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About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary 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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