Nucleophilicity order is correctly represented by

Options

A. `CH_(3)^(-)lt NH_(2)^(-) lt HO^(-) lt F^(-)`
B. `CH_(3)^(-)~~NH_(2)^(-)gtHO^(-)~~F^(-)`
C. `CH_(3)^(-) gt NH_(2)^(-) gt HO^(-) gt F^(-)`
D. `NH_(2)^(-)gt F^(-) gt HO^(-) gt CH_(3)^(-)`

Answer

C

Explanation

If nucleophilic atoms `(C, N, O, and F)` belong to the same period of the periodic table, then nucleophilicity is directly related to the basic strength of the species.
Order of basic strength of conjugate acid:
`HF gt H_(2)O gt NH_(3) gt CH_(3)`
Order of basic strength of conjugate base:
`CH_(3)^(-) gt NH_(2)^(-) gt HO^(-) gt F^(-)`
Thus, the order of nucleophilicity is
`CH_(3)^(-) gt NH_(2)^(-) gt HO^(-) gt F^(-)`