In the electrolysis of alumina, a layer of powdered coke is spread on the surface of the electrolyte in the cell

Options

A. to increase the electrical conductivity
B. to decrease the melting point of alumina
C. to prevent the loss of heat by radiation and burning of carbon electrode
D. None of the above

Answer

C

Explanation

It is done to check the loss of heat by radiation and burning of carbon electrode.