Condiser the reactions,
(i) `(CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)OH)rarr(CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+HBr`
(ii) `(CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)O^(-))rarr(CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+Br^(-)`
The mechanism of reactions (i) and (ii) are respectively :

Options

A. `S_(N^2)` and `S_(N^2)`
B. `S_(N^2)` and `S_(N^1)`
C. `S_(N^1)` and `S_(N^2)`
D. `S_(N^1)` and `S_(N^1)`

Answer

C

Explanation

First reaction is `S_(N^1)` reaction because `C_(2)H_(5)OH` used as solvent which is a weak nucleophile. Second reaction is `S_(N^2)` reaction because `C_(2)H_(5) O^(-)` is strong nucleophile