The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-C-=C^(-)` and `CH_(3)-CH_(2)^(-)`:A. `CH_(3)CH_(2)^(-) gtNH_(2)^(-) gt H-C-=C^(-) gt OH^(-)`B. `H-C-=C^(-)gtCH_(3)-CH_(2)^(-)gtNH_(2)^(-) gtOH^(-)`C. `OH^(-) gt NH_(2)^(-) gt H-C-=C^(-)gtCH_(3)CH_(2)^(-)`D. `NH_(2)^(-)gtH-C-=C^(-)gtOH^(-)CH_(3)CH_(2)^(-)`

The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-

1.	The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-C-=C^(-)` and `CH_(3)-CH_(2)^(-)`:A. `CH_(3)CH_(2)^(-) gtNH_(2)^(-) gt H-C-=C^(-) gt OH^(-)`B. `H-C-=C^(-)gtCH_(3)-CH_(2)^(-)gtNH_(2)^(-) gtOH^(-)`C. `OH^(-) gt NH_(2)^(-) gt H-C-=C^(-)gtCH_(3)CH_(2)^(-)`D. `NH_(2)^(-)gtH-C-=C^(-)gtOH^(-)CH_(3)CH_(2)^(-)`
Answer» Correct Answer - A A weak acid has strong conjugate base. Since the acidic nature decrease in the order `H_(2)O gt H-C-=C-HgtNH_(3)gtCH_(3)-CH_(3)` Therefore , the conjugate base strength follows the order given in (A ).

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