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Each comprehension given below is followed by some multiple choice questions. Each question has one correct option. Choose the correct option.
Comprehension 9 According to Fajan rules, the percentage of covalent character in an ionic compound increases if the cation is highly charged or the cation is small and the anion is large or the cation has pseudo inert gas configuration. As a result of increased covalent character, the melting point decreases and solubility in less polar solvent increases.
The highest lattice energy corresponds to
(A) \( \mathrm{MgO} \)
(B) \( \mathrm{CaO} \)
(C) \( \mathrm{SrO} \)
(D) \( \mathrm{BaO} \)
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