The role of fluorspa, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is to
The role of fluorspa, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is to
A. act as a catalyst
B. make fused mixture conducting.
C. lower the melting temperature of the mixture.
D. decrease the rate of oxidation of carbon at anode.
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