A) \[CH_{3}^{-}<NH_{2}^{-}<H{{O}^{-}}<{{F}^{-}}\]
B) \[CH_{3}^{-}\simeq NH_{2}^{-}>H{{O}^{-}}\simeq {{F}^{-}}\]
C) \[CH_{3}^{-}>NH_{2}^{-}>H{{O}^{-}}>{{F}^{-}}\]
D) \[NH_{2}^{-}>{{F}^{-}}~>H{{O}^{-}}>CH_{3}^{-}\]
Correct Answer: C
Solution :
[c] Nucleophilicity increases with the decrease in electronegativity of the central atom. Since electronegativity follows the order: \[F>O>N>C;\] nucleophilicity of the concerned group will follow the reverse order i.e., \[C{{H}_{3}}^{^{-}}>N{{H}_{2}}^{^{-}}>O{{H}^{-}}>{{F}^{^{-}}}\]
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