JEE Main Chemistry question

is soluble in water whereas fluorides of other alkaline earth metals are insoluble because of:

(A)Ionic nature of
(B)Covalent nature of
(C)Greater hydration energy of ion as compared to its lattice energyCorrect
(D)None of the above

Answer: (C)

Solution

Although has some covalent character, its water solubility is specifically explained by the exceptionally high hydration energy of the very small ion, which exceeds the lattice energy of , favouring dissolution. For , , and , the larger cations have

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Question ID VK-137989