What is not true for R in R - OH?
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The statement that R = H is more acidic than phenol is not true.Phenol is more acidic than a hydrogen atom bonded to an alkyl group because the phenoxide ion is more stabilized by resonance than the alkoxide ion. The phenoxide ion has two resonance structures, while the alkoxide ion has only one resonance structure.The more stable the anion, the stronger the acid. Therefore, phenol is a stronger acid than a hydrogen atom bonded to an alkyl group.
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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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