1.

In the extraction of aluminium by Hall-Heroult process, purified Al_(2)O_(3) is mixed with CaF_(2) to

Answer»

lower the MELTING point of `Al_(2)O_(3)`
increase the CONDUCTIVITY of MOLTEN mixture.
reduce `AL^(3+)` (aq) into Al (s).
act as catalyst.

Solution :are both correct options.


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