Essential Chemistry for IGCSE - Electricity And Chemistry (Section 4 - No. 44)
What is the role of carbon in the extraction of aluminum?
It is used to purify the ore.
It is used as an electrode.
It reacts with oxygen at the anode.
It helps to dissolve aluminium oxide.
Explanation
Carbon is used to make anodes and reacts with the oxygen to form CO2.
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