Question

The correct order of increasing lattice energy for:

$LiCl,NaCl,KCl,RbClandCsCl$ is :

• A. $LiCl<RbCl<KCl<NaCl<CsCl$
• B. $LiCl<RbCl<NaCl<KCl<CsCl$
• C. $CsCl<NaCl<KCl<RbCl<LiCl$
• D. $CsCl<RbCl<KCl<NaCl<LiCl$

Answer 1

The correct option is D $CsCl<RbCl<KCl<NaCl<LiCl$
Lattice energy:as we move from top to bottom in a group the lattice energy will be decreased due to decrease in bond strength and increase in bond length.So the correct order of lattice energy is .$CsCl<RbCl<KCl<NaCl<LiCl$.
Hence option D is correct.