The alkaline earth metal sulphate(s) which are readily soluble in water is/are:
(A) BeSO$$_4$$
(B) MgSO$$_4$$
(C) CaSO$$_4$$
(D) SrSO$$_4$$
(E) BaSO$$_4$$
Choose the correct answer from the options below:

We need to identify which alkaline earth metal sulphates are readily soluble in water.

Solubility trend of alkaline earth metal sulphates:

The solubility of sulphates of alkaline earth metals decreases down the group due to the decrease in hydration enthalpy being more significant than the decrease in lattice enthalpy.

Solubility order: BeSO$$_4$$ > MgSO$$_4$$ > CaSO$$_4$$ > SrSO$$_4$$ > BaSO$$_4$$

Analysis:

(A) BeSO$$_4$$ — Readily soluble ✓

(B) MgSO$$_4$$ — Readily soluble ✓

(C) CaSO$$_4$$ — Slightly soluble (sparingly soluble)

(D) SrSO$$_4$$ — Insoluble

(E) BaSO$$_4$$ — Insoluble

Only BeSO$$_4$$ and MgSO$$_4$$ are readily soluble in water.

The correct answer is Option 3: A and B.