Question

Which of the following has the highest ionic mobility in an aqueous solution?

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

Answer 1

The correct option is B $R{b}^{+}$

Larger the size of the cation, lower will be its hydration, which leads to a smaller hydrated size and a higher mobility.