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The majore role of flurospar (CaF(2)) wh...

The majore role of flurospar `(CaF_(2))` which is added in small quantities in the electrolytic reduction of aluminia dissolved in fused cryolite `(Na_(3)AIF_(6))` is:

A

as a catalyst

B

to make the fused mixture very conducting

C

to lower the temperature of the melting of the molt.

D

to decrease the rate of oxidatoin of carbon at anode

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The correct Answer is:
B,C
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