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# Which of the following molecule is having highest lattice energy

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

Can you answer this question?

$LiF$(U=-247k.col/mole) $> LiCl(-203) > LiBr(-193) > LiI(-180)$
Lattice energy varies inversely as the inter-nuclear distance.
Hence (a) is the correct answer.
answered Mar 7, 2014