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.

Alkyl halides can participate in both S_(N^(1)) and S_(N^(2)) reaction

1.	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.
Answer» by the electron rich oxygen atoms of solvent `(H_(2)O)` molecules. stabilisation of CARBOCATION y the electorn rich oxygen atoms LEADING to SOLVATION. both are correct. none is correct. Solution :Solvation of carbocation RESULTS in release of energy as well as increase in its stability.