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Which set of compounds in the following pair of ionic compounds has the higher lattice energy?
(i) \( \mathrm{KCl} \) and \( \mathrm{MgO} \)
(ii) \( \mathrm{LiF} \) and \( \mathrm{LiBr} \)
(iii) \( \mathrm{Mg}_{3} \mathrm{~N}_{2} \) and \( \mathrm{NaCl} \)
(a) \( \mathrm{KCl}, \mathrm{LiBr}, \mathrm{Mg}_{2} \mathrm{~N}_{2} \)
(b) \( \mathrm{MgO}, \mathrm{LiBr}, \mathrm{Mg}_{3} \mathrm{~N}_{2} \)
\( \mathrm{P} \)
(c) \( \mathrm{MgO}, \mathrm{LiF}, \mathrm{NaCl} \)
(d) \( \mathrm{MgO}, \mathrm{LiF}, \mathrm{Mg}_{3} \mathrm{~N}_{2} \)
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