The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-C-=C^(-)` and `CH_(3)-CH_(2)^(-)`:

Options

A. `CH_(3)-CH_(2)^(-)gtNH_(2)^(-)gtH-CequivC^(-)gtOH^(-)`
B. `H-CequivC^(-)gtCH_(3)-CH_(2)^(-)gtNH_(2)^(-)gtOH^(-)`
C. `OH^(-)gtNH_(2)^(rarr)H-CequivC^(-)gtCH_(3)-CH_(2)^(-)`
D. `NH_(2)^(-)gtH-CequivC^(-)gtOH^(-)-H_(3)C-CH_(2)^(-)`

Answer

A

Explanation

The strength of their conjugate acids are in the order
`H_(2)0gtHCequivCHgtNH_(3)gtCH_(3)-CH_(3)` Stronger the acid weaker is its conjugate base. Therefore correct order of strength of their conjugate bases is
`CH_(3)-CH_(2)^(-)gtNH_(2)^(-)gt HCequivC^(-)gtOH^(-)`