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JEECUP (UP Polytechnic) Acidity — practice questions

Explore 1 free Acidity questions in JEECUP (UP Polytechnic) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Acidity questions and exercises with answers

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**Phenol is more acidic than ethanol** because:Read the answer and worked solution →

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**Phenol is more acidic than ethanol** because:

  1. Phenol has more carbon atoms
  2. Phenoxide anion is resonance-stabilised by the aromatic ring
  3. Ethanol has higher molecular weight
  4. Phenol is a base
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Correct answer: B. Phenoxide anion is resonance-stabilised by the aromatic ring

After loss of H⁺, phenoxide (PhO⁻) delocalises negative charge into the ring (ortho/para positions) via resonance ⇒ very stable. Ethoxide (CH₃CH₂O⁻) has no such stabilisation. pKa: phenol ~10, ethanol ~16. Phenol is ~6 orders of magnitude more acidic.

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