Question

# Which of the following is the correct order of melting point?LiCl<NaClNaCl<KClKCl<RbClAll of the above

Solution

## The correct option is A LiCl<NaClAs we move down the group, lattice energy decreases. Hence, the melting point decreases. However, due to polarisation of Cl− ion by Li+, LiCl is highly covalent and hence it has a lower melting point than NaCl.

Suggest corrections