Question

Arrange licl,nacl,kcl,rbcl in increasing order of melting point

Answer 1

Since covalent character according to fajan's rule goes as:

LiCl>NaCl>KCl>RbCl

So, ionic character is:

LiCl<NaCl<KCl<RbCl

And we know ionic compounds have high melting points so order of melting point is:

LiCl<NaCl<KCl<RbCl