In the centext of the hall-heroul process for the extraction of `AI` , which of the following statement is false?A. `AI_(2)O_(3)` is mixed with `CaF_(3)` which lower the melting point of the mixture and brings conductivityB. `AI^(2+)` is reduced at the cathod to from `AI`C. `NaAIF_(6)` serves as the electrolyteD. `CO` and `CO_(2)` are produced in the process

In the centext of the hall-heroul process for the extraction of `AI` ,

1.	In the centext of the hall-heroul process for the extraction of `AI` , which of the following statement is false?A. `AI_(2)O_(3)` is mixed with `CaF_(3)` which lower the melting point of the mixture and brings conductivityB. `AI^(2+)` is reduced at the cathod to from `AI`C. `NaAIF_(6)` serves as the electrolyteD. `CO` and `CO_(2)` are produced in the process
Answer» Correct Answer - b 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)`

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