1.

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

Answer»

`CH_(3) - CH_(2)^(-) gt NH_(2)^(-) gt H - C^(-) gt OH^(-)`
`H - C -= C^(-) gt CH_(3) - CH_(2)^(-)gt NH_(2)^(-) gt OH^(-)`
`OH^(-) gt NH_(2)^(-) gt H - C -= C^(-) gt CH_(3) - CH_(3)^(-)`
`NH_(2)^(-) gt H - C -= C^(-) gt OH^(-) gt CH_(3) - CH_(2)^(-)`

Solution :order of basic strength
`CH_(3) - CH_(2)^(-) gt BAR(N)H_(2) gt HC -= C^(-) gt OH^(-)`
because their acids have following order of acidic strength
`H - OH gt HC -= CH gt NH_(3) gt CH_(3) - CH_(3)`
(conjugate base of strong ACID is weaker while conjugate base of WEAK acid is stronger).


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