The hydration enthalpy of `Mg^(2+)` is greater than

Options

A. `Al^(3+)`
B. `Na^(o+)`
C. `Ca^(2+)`
D. `Sr^(2+)`

Answer

B

Explanation

Due to higher cahrge/radius ratiohn of `Mg^(2+)` as compared to `Na^(o+)`, hydration enthalpy of `Mg^(2+)` is greater than `Na^(o+)`.