Which of the following has the highest nucleophilicity ?

Options

A. `F^(-)`
B. `OH^(-)`
C. `CH_(3)^(-)`
D. `NH_(2)^(-)`

Answer

C

Explanation

Acids form conjugate base after donation of proton. In acids, strong acid forms weak conjugate base while weak acid forms strong conjugate base.
Order of basic strength (nucleophilicity)
`overset(-)(C)H_(3) gt overset(-)(N)H_(2) gt overset(-)(O)H gt overset(-)(F)`
The acidic character of hydrides in period of periodic table increases on moving from left to right side. Hence, their acids have the following order of acidic strength:
`CH_(4) lt NH_(3) lt H_(2)O lt HF`