Question

The mobilities of the alkali metal ions in aqueous solution are $Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$ 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)

Greater is the degree of hydration, lesser is the mobility in aqueous medium.

Answer 2

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