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Question

For the species (I,Cl,Br), the increasing order of nucleophilicity in water would be:

A
I<Cl<Br
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B
Br<Cl<I
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C
I<Br<Cl
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D
Cl<Br<I
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Solution

The correct option is D Cl<Br<I
H2O is a polar solvent.
Nucleophilicitysize
Smaller the size of anion, more it will be hydrated by H2O and less will be the nucleophilicity.
Hence, the order is: Cl<Br<I

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