Covalent compound ionic compounds
1)it has low melting and boiling points it has high melting and boiling points
2)they exist in all 3 states(solid,liquid & it can only exist in solid state
3)they do not conduct electricity they conduct electricity
4)they are soluble in non-polar they are not soluble in non-polar solvents but not soluble in H2O. solvents but soluble in H2O.