Question

Lattice energy (numerical value) of chloride of alkali metals is in order of
A. LiCl `gt ` NaCl `gt ` KCl` gt ` RbCl `gt` CsCl
B. LiCl `lt `NaCl `lt ` KCl `lt` RbCl `lt` CsCl
C. `NaCl lt KCl lt LiCl lt RbCl lt CsCl`
D. `NaCl lt KC lt RbCl lt CsCl lt Li Cl`

Answer 1

Correct Answer - A
The correct order for lattice enregy of chloride of alkali metals
`LiCl gt NaCl gt KCl gt RbCl gt CsCl`
Smaller cation polarises anion to a greater extent hence, larger covalent nature and thus higher lattice energy.