Q.

Based on lattice energy and other considerations which one of the alkali metal chloride is expected to have the highest m.p.?

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a

LiCl

b

NaCl

c

KCI

d

CsCl

answer is B.

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Detailed Solution

As we go down in the group, ionic character increases hence, melting point of halides should increase but NaCl has the highest melting point (800oC) due to its high lattice energy.
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