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)` ) is

Options

A. As a catalyst
B. To make the fused mixture very conducting
C. To lower the temperature of the melt
D. To decreases the rate of oxidation of carbon at the anode

Answer

B, C

Explanation

To make the fused mixture very conducting and to reduce to temperature of the melt .