Arrange the following in the increasing order of their ability as a leaving group:
(a) `CH_(3)S^(-). CH_(3)O^(-), CF_(3)^(-)` and `F^(-)`
(b) `CF_(3)SO_(3)^(-), CH_(3)SO_(3)^(-)` and `CH_(3)COO^(-)`

Answer

(a) `CF_(3)^(-) lt CH_(3)O^(-) lt CH_(3)S^(-)`; (b) `CH_(3)COO^(-) lt CH_(3)SO_(3)^(-) lt CF_(3)SO_(3)^(-)`