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In the metallurgy of aluminium,...

In the metallurgy of aluminium,

A

`Al^(3+)` is oxidised to `Al`(s).

B

graphide anode is oxidised to carbon monoxide and carbon dioxide.

C

oxidation state of oxygen changes in the reaction at anode.

D

oxidation state of oxygen changes in the overall reaction involved in the process.

Text Solution

Verified by Experts

The correct Answer is:
B
`C(s) + O^(2-) ("melt") to CO(g) + 2e^(-)`
`C(s) + 2O^(2-) ("melt") to CO_2 (g) + 4e^(-)`
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