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The major role of fluorpar (`CaF_2` ) which added in small quantities in the electrolyte reduction of alumina dissolved in fused cryolite `(N_(3)AlF_(6)` ) isA. as a catalystB. to make the fused conducting mixtureC. to lower the fusion temperature of the molten massD. to reduce the rate of oxidation of the carbon at anode. |
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Answer» Correct Answer - C Impurity in solid decreases melting point . |
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