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

Which among the following is $\mathrm{NOT}$ correct statement about $\mathrm{S}_{\mathrm{N}} \mathrm{l}$ reaction?
  1. A more powerful nucleophile favours $S_N 1$ mechanism.
  2. $\mathrm{S}_{\mathrm{N}} \mathrm{l}$ reaction proceeds via formation of carbocation intermediate.
  3. $\mathrm{S}_{\mathrm{N}} 1$ reaction proceeds more rapidly in polar protic solvent.
  4. 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.

Asked in: MHT CET 2021 (20 Sep Shift 2)

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