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What is the role of graphite rods in the...

What is the role of graphite rods in the electro metallurgy of aluminium?

Text Solution

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(i) Graphite rods act as anode during electrolytic reduction of alumina.
(ii) At anode, `O_(2)` gas is produced which react with the carbon of anode (rods) to produce `CO_(2)` gas.
(iii) So these graphite rods are consumed slowly and need to be replaced from time to time.
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