Aluminium can be obtained by the electrolytic refining of aluminium oxide.

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Q. Purification of aluminium by electrolytic refining, is known as ____________.

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. Aluminium can be obtained by the electrolytic refining of aluminium oxide.

Q. Purification of aluminium by electrolytic refining is called:

Write the equation for the reaction where the aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide.

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