Q44 / 150 · MHT CET 2021 (20 Sep Shift 2) · Chemistry

Which among the following is $\mathrm{NOT}$ correct statement about $\mathrm{S}_{\mathrm{N}} \mathrm{l}$ reaction?

  • Correct answer
    A
    A more powerful nucleophile favours $S_N l$ mechanism.
  • B
    $\mathrm{S}_{\mathrm{N}} \mathrm{l}$ reaction proceeds via formation of carbocation intermediate.
  • C
    $\mathrm{S}_{\mathrm{N}} 1$ reaction proceeds more rapidly in polar protic solvent.
  • D
    The rate of $\mathrm{S}_{\mathrm{N}} \mathrm{l}$ mechanism is independent of the nature of nucleophile.

Solution

A more powerful nucleophile attacks the substrate faster and favours $\mathrm{S}_{\mathrm{N}} 2$ mechanism.

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

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