Question

Among the following ions, which has the least ionic mobility in aqueous medium?

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

Answer 1

The correct option is C $L{i}^{+}$

The smallest ion, $\left(L{i}^{+}\right)$ is the most hydrated in aquesous medium. A big cluster of water molecules surround it as it has a very high charge density. Therefore, $L{i}^{+}$ has the least ionic mobility.