MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic ChemistryMetallurgyExtraction of Aluminium

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

A.Al3+ is reduced at the cathode to form Al

B.Na3AlF6 serves as the electrolyte✓ Correct

C.CO and CO2 are produced in this process

D.Al2O3 is mixed with CaF2 which lowers the

Explanation

In the extraction of aluminium by the Hall-Heroult process, the electrolyte used is 2 3 Al O . So, the 2 3 Al O undergoes a redox reaction. The solvent used in this process is 3 6 Na AlF , though it is an electrolyte.

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