The seqeunce of ionic mobility in the aqueous solution is

Options

A. `Rb^(+)gt K^(+) gt Cs^(+) gt Na^(+)`
B. `Na^(+) gt K^(+) gt Rb^(+) gt Cs^(+)`
C. `K^(+) gt Na^(+) gt Rb^(+) gt Cs^(+)`
D. `Cs^(+) gt Rb^(+) gt K^(+) gt Na^(+)`

Answer

D

Explanation

Bigger the size , lower is the extent of hydration , smaller is the mass of the hydrated species and hence higher is the ionic mobility in the aqueous solution . Thus option (d) is correct .