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. as a catalyst
B. to lower the temperature of the melt and improve the conductivity of cell
C. to decrease the rate of oxidatiom of carbon at the anode
D. to decrease the raet of oxidaiton of carbon at the cathode

Answer

B

Explanation

`CaF_(2)`and `Na_(3)A1F_(6)`are added to decrease the `MP` of electrolyte and increase the conductivity of cell.