In the centext of the hall-heroul process for the extraction of `AI` , which of the following statement is false?

Options

A. `AI_(2)O_(3)` is mixed with `CaF_(3)` which lower the melting point of the mixture and brings conductivity
B. `AI^(2+)` is reduced at the cathod to from `AI`
C. `NaAIF_(6)` serves as the electrolyte
D. `CO` and `CO_(2)` are produced in the process

Answer

b

Explanation

In the Hall -Heroudt process for the extraction of `AI` purified `AI_(2)O_(3)` is mixed with `Na_(2) AIF_(4) or CaF_(2)` which lowers the melting point of the milt and bring condactivity
The electrolytic reactions are
`Calbode AI (melt) + 3e rarr AI(1)`
`Anode C (s) + O^(2) (melt) rarr CO_(2)(g) + 4 e `
The oxygen gas librted at reaction with xcarbon electrodes to leberate `CO and CO_(2)`
The overall reraction may be taken as
` 2AI_(2)O_(3) + 3C rarr AAI + 3CO_(2)`