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  4. The correct order of the lattice energies of the following ionic compounds is

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Q. The correct order of the lattice energies of the following ionic compounds is

KEAMKEAM 2005Chemical Bonding and Molecular Structure

Solution:

Lattice energy depends upon :
(a) the product of ionic charges
(b) the interionic distance
( c) nature of the crystaI structure
Hence, more is the ionic charge, more will be the Iattice energy.
So, the correct order is
$ \, \, \, \, \, Al_2O_3 > CaO > MgBr_2 > NaCl$