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Question

In Hall-Heroult process CO2 is released at ?

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Solution

The Hall Heroult process is the major industrial process for smelting aluminium. The aluminium reduction process is described as,
2Al2O3+3C4Al+3CO2
Anode reaction C(s)+202(l)CO2(g)+4e
Cathode reaction Al3+(l)+3eAl(l)
So, we can see that CO2 is released at anode.

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