Extraction of aluminium can be understood by :

Electrolytric reduction of `Al_(2) O_(3)` :
Electrolysis : `Al_(2) O_(3) + Cryolite + CaF_(2)`
Cathode : Carbon inside the `Fe` container
Anode : Graphite rods.
The function of fluorspar `(CaF_(2))` is.

Options

A. to increase the melting point of electrolyte
B. to increase electrolytic conductivity power
C. to remove the impurities as slag
D. all of the above

Answer

B