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Question
Q15) Which of the following is least soluble in water? [ Pb. CET 1988]



SOLUTION

As per NCERT book "BeSO4, and MgSO4 are readily soluble in water; the solubility decreases from CaSO4 to BaSO4. The greater hydration enthalpies of Be2+ and Mg2+ ions overcome the lattice enthalpy factor and therefore their sulphates are soluble in water."
Answer:(b)