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 sulphate, graphite, rubidium, argon, silicon carbide.
Ionic solids conduct electricity in liquid state but not in solid state. Explain.
Ionic solids do not conduct electric current in solid state because in the solid ionic compound, the ions are held together in fixed positons by strong electrostatic forces and cannot move freely. Ionic solids conduct electricity in liquid state because the crystal structure is broken down and ions become free to move and conduct electricity.