Question

The mobilities of the alkali metal ions in aqueous solution are $L{i}^{+}<N{a}^{+}<K^{+}<R{b}^{+}<C{s}^{+}$ because

• A. greater is the degree of hydration, lesser is the mobility in aqueous medium
• B. larger the size of cation, greater is the mobility in aqueous medium
• C. larger the size of cation, lesser is the mobility of ions in aqueous medium
• D. lesser the degree of hydration, lesser is the mobility of ions in aqueous medium

Answer 1

Answer: (A)

Smaller the size of the ion, greater is the degree of hydration and hence lesser is the mobility in aqueous medium.