The fluorspar (CaF2) is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3$$ $$AlF6$$ $$). The role of fluorspar $$is/areI$$. to decrease the rate of oxidation of carbon at anode.II. to act as a catalyst.III. to lower the temperature of the melt.IV. to make the fused mixture very conducting. Choose the correct $$statement(s)$$.

Question

The fluorspar (CaF2) is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3$$ $$AlF6$$ $$). The role of fluorspar $$is/areI$$. to decrease the rate of oxidation of carbon at anode.II. to act as a catalyst.III. to lower the temperature of the melt.IV. to make the fused mixture very conducting.     Choose the correct $$statement(s)$$.

Infinity Learn · Accepted Answer

The fluorspar (CaF2) is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6$$ $$) which lowers the melting point of the mixture and increases conductivity.

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