Choose the correct order arranged in decreasing order of basicity

Options

A. `CH-=C^(-) gt CH_(3)^(-) O gt OH^(-)`
B. `OH^(-) gt CH_(3)O^(-) gt CH-= C^(-)`
C. `CH_(3)O^(-) gt OH^(-) gt CH -= C^(-)`
D. `CH_(3)O^(-) gt CH-=C^(-) gt OH^(-)`

Answer

A

Explanation

The strength of the conjugate acids of the given bases are in the order
`H_(2)Ogt CH_(3)OH gt CH-=CH`.
Stronger the acid, weaker is the conjugate base. Hence decreasing order of basicity is
`HC-=C^(-) gt CH_(3)O^(-) gt OH^(-)`