1) It is formed when there is complete ransfer of electrons from one atom another. [0.5 Marks]
2) They exists as hard solids consisting ions. [0.5 Marks]
3) These are non - volatile with high boiling point and melting point. [0.5 Marks]
4) They do not conduct electricity in solid state but are good conductor of electricity in molten state or aqueous phase. [0.5 Marks]