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QAIPMT-2008-Ch-2220: NEET 2008 Chemistry - Class 11 AIPMT-2008-Ch-2220 Solution: The sequence of ionic mobility in aqueous solution is

The sequence of ionic mobility in aqueous solution is

Multiple Choice Options

A $Rb^+>K^+>Cs^+>Na^+$
B $Na^+>K^+>Rb^+>Cs^+$
C $K^+>Na^+>Rb^+>Cs^+$
D $Cs^+>Rb^+>K^+>Na^+$

Step-by-Step Verified Solution

Smaller the size of an ion, greater will be the degree of hydration. So, degree of hydration is highest for Li + and that is smallest for Cs + . Therefore, Li + holds the water molecules in its hydration sphere and Cs + ion holds the least water molecules. Hence, the correct ionic mobility in aqueous medium is : Cs + > Rb + > K + > Na +

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