The seqeunce of ionic mobility in the aqueous solution is

Options

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

Answer

B

Explanation

In aqueous solution, because of hydration the order of effective size is :
`Na^(+) gt K^(+) gt Rb^(+) gt Cs^(+)`
Greater is size lesser is mobility .