Q68 / 180 · AIIMS 2015 · Chemistry

Assertion: Phenol undergoes Kolbe's reaction whereas ethanol does not. Reason : Phenoxide ion is more basic than ethoxide ion.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Ifboth assertion and reason are true but reason is not the correct explanation of assertion.
  • Correct answer
    C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

Phenol undergoes Kolbe's reaction (an electrophilic substitution reaction) because conjugate base (phenoxide ion) is less basic than ethoxide $\left(\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}\right)$ion.

Hence, the correct answer is option: 'C'.

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