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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

increases the conductivity of molten mixture

C

reduce `Al^(3+)` into `Al(s)`

D

acts as catalyst

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Assertion : In the metallury of aluminium , purified Al_(2)O_(3) is mixed with Na_(3)AlF_(6) or CaF_(2) . Reason : Na_(3)AlF_(6) or CaF_(2) lowers the melting point of mixture and increases its conductivity.

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ALLEN-METALLURGY-EXERCISE -04
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  12. Which of the following statements are correct?

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