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Question

Which of the following orders regarding melting point of lithium halides is true

A
LiI < LiBr < LiCl < LiF
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B
LiCl > LiI > LiBr > LiF
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C
LiF > LiCl > LiF > LiBr
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D
LiI > LiBr > LiCl > LiF
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Solution

The correct option is A LiI < LiBr < LiCl < LiF
For the same alkali metal, the lattice energy decreases as size of the halide ion increases and melting point is directly proportional to lattice energy.

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