Alkyl halides can participate in both `S_(N^(1)) and S_(N^(2))` reactions depending upon their anture and conditions. The reactivity order in the three types of alkyl halides is the reverse in `S_(N^(1))` reactions than what we observe in `S_(N^(2))` reactions. Apart from that, there is inversion of configuration in case of alkyl halides when they participate in `S_(N^(2))` reactions. on the other hand, partial or complete racemisation occurs in `S_(N^(1))` reactions.
Q. `S_(N^(1))` reactions take place much more rapidly in polar solvents than in non-polar solvents. this is because of hydration of nucleophile.
A. by the electron rich oxygen atoms of solvent `(H_(2)O)` molecules.
B. stabilisation of carbocation y the electorn rich oxygen atoms leading to solvation.
C. both are correct.
D. none is correct.

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1 Answers

Correct Answer - B
Solvation of carbocation results in release of energy as well as increase in its stability.

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