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What is the role of cryolite in the metallurgy of aluminium?

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Detailed Solution

The m.p. of the pure alumina is very high. cryolite (or) fluorspar is added to alumina because
i) It lowers the m.p. of the mixture.
ii) It also makes alumina as better conductor of electricity

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What is the role of cryolite in the metallurgy of aluminium?