A) as a catalyst
B) to lower the temperature of the melt and improve the conductivity of cell
C) to decrease the rate of oxidation of carbon at the anode
D) to decrease the rate of oxidation of carbon at the cathode
Correct Answer: B
Solution :
\[Ca{{F}_{2}}\,\,and\,\,N{{a}_{3}}Al{{F}_{6}}\] are added to decrease the M.P. of electrolyte and increase the conductivity of the cell.
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