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Ionic mobility of which of the following...

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?

A

K

B

Rb

C

Li

D

Na

Text Solution

Verified by Experts

The correct Answer is:
C
`Li^(+)` is the smallest among these are has maximum electron density . Therefore , it will be heavily hydrated and its effective size in aqueous solution will be maximum among all alkali metal ions. Thus, its ionic mobility will be lowest .
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