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 $S _{ N } 2$ mechanism.
Statement – II: A secondary alkyl halide when treated with a large excess of ethanol follows $S _{ N } 1$ 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: $S _{ N } 2 \propto[ R - X ]\left[ Nu ^{-}\right]$ $S _{ N } 2$ reaction is favoured by high concentration of nucleophile $\left( Nu ^{-}\right)$ & less crowding in the substrate molecule.
Statement – II: Solvolysis follows $S _{ N } 1$ Both are correct Statements.

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