1.

The right order of the solubility of sulphates of alkaline earth metals in water is

Answer»

BegtCagtMggtBagtSr
MggtBegtBagtCagtSr
BegtMggtCagtSrgtBa
MggtCagtBagtBegtSr

Solution :Be GT MggtCa gt SR gt Ba
On moving down the the group lattice energy remains almost constant as the sulphate is so BIG that small increases in any size of the cations from Be to Ba does not make any difference. However the hydration energy decreases from `Be^(+2)` to `Ba^(+2)` . this causes decreases in the SOLUBILITY of the sulphates as the IONIC size increases.


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