Q 1.6: Classify the following solids in different categories based on the nature of intermolecular forces operating in them: Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide. Solution:
| Substance | type of solid |
| Potassium sulphate | Ionic solid |
| Benzene | Molecular solid (non−polar) |
| Urea | Polar molecular solid |
| Ammonia | Polar molecular solid |
| Water | Hydrogen bonded molecular solid |
| Zinc sulphide | Ionic solid |
| Graphite | Covalent or network solid |
| Rubidium | Metallic solid |
| Argon | Non−polar molecular solid |
| Silicon carbide | Covalent or network solid |
