Question

The correct order of ionic size in polar solvent is

• A. $L{i}^{+}>N{a}^{+}>K^{+}>R{b}^{+}$
• B. $R{b}^{+}>K^{+}>N{a}^{+}>L{i}^{+}$
• C. $K^{+}>N{a}^{+}>L{i}^{+}>R{b}^{+}$
• D. $R{b}^{+}>N{a}^{+}>K^{+}>L{i}^{+}$

Answer 1

Answer: (A)

In polar solvent, solvation is maximum for $L{i}^{+}$ , due to high charge density on small size. Hence size of solvated cation is in the order $L{i}^{+}>N{a}^{+}>K^{+}>R{b}^{+}$