Select the correct order of solubility (in water ) from the following :

S r S O_{4} < C a S O_{4} < M g S O_{4} < B e S O_{4}

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N a F < K F < R b F < C s F

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B a (O H) > S r (O H) > C a (O H) > M g (O H)

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All of these

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Solution

The correct option is A $S r S O_{4} < C a S O_{4} < M g S O_{4} < B e S O_{4}$
As we down the group solubility of sulphates decreases since it starts forming precipitates.

Hence $S r S O_{4} < C a S O_{4} < M g S O_{4} < B e S O_{4}$

Solution energy is less than hydration energy.

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