Which of the following alkaline earth metal sulphates possesses a hydration enthalpy that is strictl — s Block Elements Chemistry Question

💡 Solution & Explanation

Beryllium has the smallest ionic size among Group 2 elements, yielding an exceptionally high hydration enthalpy for the $Be^{2+}$ ion. This hydration enthalpy is large enough to completely overcome the lattice enthalpy of the sulphate crystal, making $BeSO_4$ highly soluble in water.