In the extraction of aluminium by Hall-Heroult process, purified Al_2O – InterviewSolution

1.	In the extraction of aluminium by Hall-Heroult process, purified Al_2O_3 is mixed with CaF_2 to...
Answer» Lower the MELTING point of `Al_2O_3`. Increase the conductivity of molten mixture. Reduce `AL^(3+)` into` Al_((s))` ACTS as catalyst. Solution :`CaF_2` depresses the melting point of ALUMINA and INCREASES electrical conductivity.

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