Question

Give reason for the following: 

(a) Aluminium oxide is considered as an amphoteric oxide. 

(b) Ionic compounds conduct electricity in molten state. 

Answer 1

(a) It is because it reacts with acids as well as bases to produce salts and water.’Al’ is less electropositive metal. So, it forms amphoteric oxide which can react with acid as well as base. 

(b) Ionic compounds can conduct electricity in molten state because ions ’ become free to move in molten state.