WBJEE 2017 Chemistry Solved Paper

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Question : 37 of 40

Marks: +1, -0

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

as a catalyst
to make fused mixture conducting
to lower the melting temperature of the mixture
to decrease the rate of oxidation of carbon at anode

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