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# Which of the following represent the correct order of decreasing lattice energy?

$\begin{array}{1 1}(a)\;LiF > LiCl > LiBr > LiI\\(b)\;LiI > LiBr > LiCl > LiF\\(c)\; LiI > LiBr > LiF > LiCl\\(d)\; LiCl > LiF > LiBr > LiI\end{array}$

lattice energy varies inversely as inter nuclear distance between the oppositely charged ions in an ionic crystal
Hence (a) is the correct answer.