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NEET levelSingle correct optionDifficulty 1 of 3o1011

In methanol (a polar protic solvent), the correct order of nucleophilicity of the halide ions is

A $I X^{-} > Cl X^{-} > Br X^{-} > F X^{-}$
B $F X^{-} > Cl X^{-} > Br X^{-} > I X^{-}$
C $I X^{-} > Br X^{-} > Cl X^{-} > F X^{-}$
D $Br X^{-} > I X^{-} > Cl X^{-} > F X^{-}$

Answer: C

In protic solvents the smaller anions are more strongly hydrogen bonded, so nucleophilicity increases down the group. The order in methanol is

I X^{-} > Br X^{-} > Cl X^{-} > F X^{-}

, the reverse of the basicity order.

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