JEE Chemistry · Medium

General Organic Chemistry: Acidity MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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AcidityMediumQuestion 730009

Question

Acidity of alcohols follows the order:
  1. A
    CH₃OH > C₂H₅OH > (CH₃)₂CHOH > (CH₃)₃COH
    Correct
  2. B
    (CH₃)₃COH > (CH₃)₂CHOH > C₂H₅OH > CH₃OH
  3. C
    All equal
  4. D
    t-BuOH > MeOH

Correct answer

CH₃OH > C₂H₅OH > (CH₃)₂CHOH > (CH₃)₃COH

Explanation

Alkyl groups donate electron density and destabilise the alkoxide conjugate base. Thus acidity decreases with greater alkyl substitution: CH₃OH > C₂H₅OH > (CH₃)₂CHOH > (CH₃)₃COH.