A) \[BeS{{O}_{4}}\]
B) \[CaS{{O}_{4}}\]
C) \[C{{O}_{2}}\]
D) \[{{H}_{2}}S\]
Correct Answer: A
Solution :
The solubility of alkaline earth metal sulphates decreases down the group because ionic size increases.\[BeS{{O}_{4}}\]is readily soluble in water, because the greater hydration enthalpy of\[B{{e}^{2+}}\]ion overcomers the lattice enthalpy factor.
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