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In the extraction of aluminium by Hall-H...

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+)` into Al(s)`

D

acts as catalyst

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The correct Answer is:
1,2,17
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