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Question 880007
JEE Chemistry · Medium

s-Block Elements: Mixed MCQ

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MixedMediumQuestion 880007

Question

The correct order of solubility of alkaline earth metal sulphates in water is:
  1. A
    BeSO₄ > MgSO₄ > CaSO₄ > SrSO₄ > BaSO₄
    Correct
  2. B
    BaSO₄ > SrSO₄ > CaSO₄ > MgSO₄ > BeSO₄
  3. C
    All equally soluble
  4. D
    Depends only on temperature

Correct answer

BeSO₄ > MgSO₄ > CaSO₄ > SrSO₄ > BaSO₄

Explanation

Sulphate solubility decreases down Group 2: BeSO₄ (soluble) → MgSO₄ (soluble) → CaSO₄ (sparingly soluble) → SrSO₄ (insoluble) → BaSO₄ (insoluble, used in X-ray barium meal). Lattice energy decreases faster than hydration energy down the group.

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