MCQ
Given below are two statements:

Statement - $I$: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow $\mathrm{S}_{\mathrm{N}} 2$ mechanism.

Statement - $II$: A secondary alkyl halide when treated with a large excess of ethanol follows $\mathrm{S}_{\mathrm{N}} 1$ mechanism.

In the the light of the above statements, choose the most appropriate from the questions given below:

  • A
    Statement $I$ is true but Statement $II$ is false
  • B
    .Statement $I$ is false but Statement $II$ is true.
  • C
     Both statement $I$ and Statement $II$ are false.
  •  Both statement $I$ and Statement $II$ are true.

Answer

Correct option: D.
 Both statement $I$ and Statement $II$ are true.
d
Statement - $I$: Rate of $\mathrm{S}_{\mathrm{N}} 2 \propto[\mathrm{R}-\mathrm{X}]\left[\mathrm{Nu}^{-}\right]$

$\mathrm{S}_{\mathrm{N}} 2$ reaction is favoured by high concentration of nucleophile $\left(\mathrm{Nu}^{-}\right)$& less crowding in the substrate molecule.

Statement - $II$: Solvolysis follows $\mathrm{S}_{\mathrm{N}} 1$ path.

Both are correct Statements.

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