why is aluminium extracted from alumina by electrolytic reduction and why not by reduction with carbon? (2 marks)

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Solution

On seeing the reactivity series,the order follows :
Al
C
Fe
That is Al is most reactive and Fe is least among the three of them. So,as Al is above carbon,that is Al is more reactive than C,so carbon cannot reduce Al from its salt form that is Al₂O₃.

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Similar questions

Name one metal each which is extracted by:
(a) reduction with carbon. (b) electrolytic reduction.
(c) reduction with aluminium (d) reduction with heat alone.

Why is $A l$ obtained only by electrolytic reduction of alumina (pure)?

Explain with reasons:

(a) In the electrolytic reduction of alumina, the graphite anode is gradually consumed.

Why the anode has to be replaced in this process?

(b) Roasting is carried out on sulphide ores and not on carbonate ores.

(d) Electrolytic reduction is done to obtain aluminium?

(e) Why 'the food containing iron salts' should not be cooked in aluminium utensils?

Q. Electrolytic reduction of alumina to aluminium by Hall-Heroult's process is carried out _____________.

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:

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why is aluminium extracted from alumina by electrolytic reduction and why not by reduction with carbon? (2 marks)

On seeing the reactivity series,the order follows : Al C Fe That is Al is most reactive and Fe is least among the three of them. So,as Al is above carbon,that is Al is more reactive than C,so carbon cannot reduce Al from its salt form that is Al2O3.

On seeing the reactivity series,the order follows :
Al
C
Fe
That is Al is most reactive and Fe is least among the three of them. So,as Al is above carbon,that is Al is more reactive than C,so carbon cannot reduce Al from its salt form that is Al₂O₃.