# Cryolite and fluorspar are mixed with $A{l_2}{O_3}$ during electrolysis for extraction of aluminium to:A: Increase the mass of the reaction mixtureB: Get other products at anode like fluorineC: Lower the melting point and increase the conductivity of the electrolyteD: Reduce aluminium oxide by cryolite
Electrolysis is the process of chemical decomposition by the passage of electric current. Chemical formula of cryolite is $N{a_3}Al{F_6}$. It is used as an insecticide and pesticide. It is used to give a yellow color to fireworks. Fluorspar is the source of fluorine which is used to give non-stick coating to pans. The chemical formula of this compound is $Ca{F_2}$. In the extraction of aluminium from aluminium oxide $A{l_2}{O_3}$ melting point of electrolyte is very high$2000 - {2500^ \circ }C$. Due to which a high amount of electricity is spent in order to melt electrolytes. To lower the melting point cryolite and fluorspar are mixed with $A{l_2}{O_3}$ during electrolysis for extraction of aluminium which will be economical as well.