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

On increasing size of cation, ionic mobility increases
`Cs^(+) gt Rb^(+) gt K^(+) gt Na^(+)`