Question

Solve this:
Q.6. The function of fluorspar in the electrolytic reduction of alumina dissolved is fused cryolite (Na3AlF6) is
(A) as a catalyst
(B) to lower the temperature of the melt and to make the fused mixture very conducting
(C) to decrease the rate of oxidation of carbon at the anode
(D) none of these above

Answer 1

the flora spa increases conductivity of molten aluminium because molten Aluminium is almost a non conductor of electricity but also increases its solubility and also reduces the fusion temperature from 2050 degree Celsius to 950 degree Celsius.