JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The correct order of solubility of fluorides of alkaline earth metals is:

(A)MgF_2>BaF_2>SrF_2>CaF_2>BeF_2
(B)BeF_2>MgF_2>CaF_2>SrF_2>BaF_2Correct
(C)BaF_2>SrF_2>CaF_2>MgF_2>BeF_2
(D)None of the above

Answer: (B)

Solution

is exceptionally soluble because the very high hydration energy of the small ion outweighs its lattice energy, while down the group this balance reverses — lattice energy stays nearly constant for this small anion while

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Question ID VK-138106