In the extraction of aluminium by Hall-Heroult process, purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to
In the extraction of aluminium by Hall-Heroult process, purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to
A. lower the melting point of `Al_(2)O_(3)`
B. increase the conductivity of molten mixture.
C. reduce `Al^(3+)` (aq) into Al (s).
D. act as catalyst.
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