First slide

Alkali metals

Question

The thermal stability of the following alkali metal chlorides follows the order:

Moderate

A

LiCl>KCI> NaCl > CsCI
B

CsCI> KCI > NaCI> LiCl
C

NaCl >KCI> LiCI > CsCI
D

LiCI> NaCl > KCI> CsCl

Solution

Lattice energy is inversely proportional to sum of sizes of ions

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