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The role of fluorspar, which is added in small quantities in the electrolysis reduction of alumina dissolved in fused cr…

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The role of fluorspar, which is added in small quantities in the electrolysis reduction of alumina dissolved in fused cryolite, is
aas a catalyst
bto make fused mixture conducting
cto lower the melting temperature of the mixture
dto decrease the rate of oxidation of carbon at anode
✓ Correct answer: b) to make fused mixture conducting
ExplanationThe electrolysis of is carried out in the steel tank linked inside with graphite.The graphite lining serves as cathode.The anode is also made of graphite rods hanging in the molten mass the electrolyte consist of alumina dissolved in fused cryolite and .Cryolite lower the melting point of alumina to and . increase the fluidity of the mass, so that the liberated aluminum metal may sink at the bottom & it is tapped off.
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