Based on lattics energy and the other considerations which one of the following alkali metal chlorides is expected to have the highest melting point ?

Based on lattics energy and the other considerations which one of the

1.	Based on lattics energy and the other considerations which one of the following alkali metal chlorides is expected to have the highest melting point ?
Answer» LICL NaCl KCl RbCl SOLUTION :ALTHOUGH lattice energy of LiCl is higher than that of NaCl but LiCl is covalent in NATURE and NaCl is ionic. After NaCl , lattice energy decreases as the size of the alkali metal ion increases . As MELTING point depends upon lattice energy and ionic/ covalent nature of the compound , NaCl has the highest melting point .