Give reason for the following:
(a) Aluminium oxide is considered as an amphoteric oxide.
(b) Ionic compounds conduct electricity in molten state.
Answers
Answer:
Ans- (a) Aluminium oxide is considered as an amphoteric oxide.
Aluminium oxide is termed as an amphoteric oxide as it shows chemical reactivity with both acids as well as bases.In some case,it behaves as a basic oxide and reacts with an acid to from salt and water whereas in other cases,it reacts with a base to produce the same.
(b) Ionic compounds conduct electricity in molten state
Ans- In molten state or dissolved state ionic compounds conduct electricity because they contain charged particles called cations and anions. These ions are free to move to conduct electricity. Thus ionic compounds conduct electricity in molten state or solution but in solid state
Answer:
Give reason for the following:
(a) Aluminium oxide is considered as an amphoteric oxide.
∵ we know that when a metal reacts with both acid and a base then it is a amphoteric metal.
Because the Aluminium reacts with both bases and acids
∴ it forms a Amphoteric oxide.
(b) Ionic compounds conduct electricity in molten state.
Ionic as the name suggest it is formed by the exchange of ions.
∵ Movement of ions is required to conduct electricity.
They conduct electricity in molten or liquid form because ions are free to move here and there.
Whereas, they don't conduct electricity in solid form because ions are not free to move in solid form.