In which of the following, the hydration energy is higher than the lattice energy?

B a S O_{4}

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M g S O_{4}

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C a S O_{4}

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S r S O_{4}

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Solution

The correct option is B $M g S O_{4}$
Ionic nature of alkaline metal sulphate increases from $B e$ to $B a$ .
$B e S O_{4} < M g S O_{4} < C a S O_{4} < S r S O_{4} < B a S O_{4}$
Solubility decreases from $B e S O_{4}$ to $B a S O_{4}$ as $B e^{2 +}$ and $M g^{2 +}$ are of small size, so their hydration energy is high.
Hydration energy $>$ Lattice energy

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In which of the following the hydration energy is higher than the lattice energy

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