The correct order of mobility of alkali metal ions in aqueous solution is

Options

A. `K^(o+)gtRb^(o+)gtNa^(o+)gtLi^(o+)`
B. `Rb^(o+)gtK^(o+)gtNa^(o+)gtLi^(o+)`
C. `Li^(o+)gtNa^(o+)gtK^(o+)gtRb^(o+)`
D. `Na^(o+)gtK^(o+)gtRb^(o+)gtLi^(o+)`

Answer

B

Explanation

Smaller the size of the ion, more is the hydration and therefore lesser is the mobility.