Distinguish between `S_(N^(1))andS_(N^(2))` mechanism.

Explanation

Distinguish between `S_(N^(1)) and S_(N^(2))` mechanism
`{:(S_(N^(1)),S_(N^(2))),((i) " In "S_(N^(1))"mechanism carbocation is formed as an intermediate.","In "S_(N^(1))" mechanism, no carbocation is formed."),((ii)" In "S_(N^(1))" mechanism, recemic mixture is obtained." ,"In "S_(N^(2))" mechanism, inversion of configuration occurs."),((iii)" In "S_(N^(1))" mechanism, front side and back side attack both occur.","In "S_(N^(2))" mechanism, only back side attack occurs."):}`