A) Be > Ca > Mg > Ba> Sr
B) Mg >Be >Ba > Ca > Sr
C) Be > Mg > Ca > Sr >Ba
D) Mg > Ca > Ba > Be > Sr
Correct Answer: C
Solution :
The solubility of sulphates of alkaline earth metals decreases regularly on moving down in the group due to decrease in hydration energy arid almost constant lattice energy. Thus, the correct order is\[BeS{{O}_{4}}>MgS{{O}_{4}}>CaS{{O}_{4}}>SrS{{O}_{4}}>BaS{{O}_{4}}\]
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