Q85 / 180 · AIIMS 2008 · Chemistry

Assertion : \(\left(\mathrm{CH}_3\right)_3 \mathrm{CCOC}\left(\mathrm{CH}_3\right)_3\) and acetone can be distinguished by the reaction with \(\mathrm{NaHSO}_3\). Reason : \(\mathrm{HSO}_3^{-}\)is the nucleophile in bisulphite addition.

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

Solution

$\mathrm{HSO}_3^{-}$is a bulky nucleophile, hence, cannot attack on sterically hindered ketones.

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

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