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The major role of fluorspar (CaF2), which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6), is (a) as a catalyst (b) to make the fused mixture very conducting (c) to lower the temperature of the melt (d) to decrease the rate of oxidation of carbon at the anode. |
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Answer» (b) to make the fused mixture very conducting (c) to lower the temperature of the melt |
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