Which of the following sulfates has the highest solubility in water due to its hydration energy?
Solubility of group 2 sulfates decreases down the group as hydration energy drops with increasing cation size. BeSO₄ (smallest cation) has the highest solubility.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
