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Q.

The correct order of ionic size in polar solvent is

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a

Rb+ > K+ > Na+ > Li+ 

b

Li+ > Na+ > K+ > Rb+ 

c

Rb+ > Na+ > K+ > Li+ 

d

K+ > Na+ > Li+ > Rb+ 

answer is A.

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Detailed Solution

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In polar solvent, salvation is maximum for Li+, due to high charge density on small size. Hence
size of solvated cation is in the order Li+ > Na+ > K+ > Rb+ 

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