Solubility of alkaline earth metal sulphates decreases down the group 2 because

Options

A. they become more ionic
B. lattica energy of sulphates does not vary siginifacantly
C. hydration energy decreases rapidly from `Be^(2+)` to `Ba^(2+)`
D. latica energy plays more predominant role than hydration energy

Answer

c

Explanation

Duet to very large size of sulphate ions, the magnitude of lattice energy of alkaline earth metal sulphates remains almost constant. Thus, their solubility is only govermed by hydration energy which decreases from `Be^(2+)` to `Ba^(2+)`