NEET2012ChemistrySurface ChemistryActual
The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order
Options
- ALi ⁺ < K ⁺ < Na ⁺ < Rb ⁺
- BRb ⁺ < K ⁺ < Na ⁺ < Li ⁺
- CK ⁺ < Na ⁺ < Rb ⁺ < Li ⁺
- DNa ⁺ < Li ⁺ < K ⁺ < Rb ⁺
Correct answer
B. Rb ⁺ < K ⁺ < Na ⁺ < Li ⁺
Step-by-step solution
Ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins decreases as the size of alkali metal ions increases. Since, the order of size of alkali metal ions Li ⁺ < Na ⁺ < K ⁺ < Rb ⁺ Thus, the ease of adsorption follows the order Rb ⁺ < K ⁺ < Na ⁺ < Li ⁺