The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction of `Al_(2)O_(3)` dissolved on fused cryolite in fused cryolite is

Options

A. to acs 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

Answer

B, C

Explanation

`CaF_(2)` is neutral flux.