In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false ?
In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false ?
A. `Al^(3+)` is reduced at the cathode to form Al
B. `Na_(3)AlF_(6)` serves as the electolyte
C. CO and `CO_(2)` are produced in this process
D. `Al_(2)O_(3)` is mixed with `CaF_(2)` which lowers the metling point of the mixture and brings conductivity
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Correct Answer - D
In Hall-Heroult process for the extraction of aluminium, the electrolyte is `Al_(2)O_(3)` dissolved in `Na_(3)AlF_(6)` and contains a little of `CaF_(2)`. This is the correct statement.
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