In polar protic solvent, strongest nucleophile among the following is:

F^{-}

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P h S^{-}

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I^{-}

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O H^{-}

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Solution

The correct option is B $P h S^{-}$
Due to $H$ bonding, $F^{-}$ and $O H^{-}$ are heavily hydrated.
$∴$ Order of nucleophilicity in polar protic solvent is $P h S^{-} > I^{-} > - O H > F^{-}$

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Which is more reactive nucleophile in polar protic solvent?

I^{-} < B r^{-} < C l^{-} < F^{-}

I^{-}