The ion with maximum hydrated ionic radii is
As we learnt in
Hydration energy of alkaline earth metals -
Decreases down the group. Larger than alkali metal ions
- wherein
Hydration energies of divalent cations is much more than monovalent cation
Hydration tendency of alkaline earth metals is higher than alkali metals because of greater charge density. Also the tendency decreases down the group as size increases.
Therefore, Mg2+ has maximum hydrated ionic radii.
Option 1)
This option is incorrect
Option 2)
This option is correct
Option 3)
This option is incorrect
Option 4)
This option is incorrect