Q 1663712645.     In the context of the Hall - Heroult process for the extraction of `Al`, which of the following statements is false ?

JEE 2015 Mains 4 April
A

`CO` and `CO_2` are produced in this process

B

`Al_2O_3` is mixed with `CaF_2` which lowers the melting point of the mixture and brings conductivity.

C

`Al^{3+}` is reduced at the cathode to `Al`.

D

`Na_3AlF_6` serves as the electrolyte.

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