The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order:

Options

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

Answer

B

Explanation

As the size of alkali metal ion increases, ease of adsorption of the hydraded alkali metals ions o an ion-exhange resin decreaases.
Since the order of size of alkali metals ions are
`Li^(+)ltNa^(+)ltK^(+)ltRb^(+)`