Question

how it is possible in extraction alumina grphite is used anode as well as cathode​

Answer 1

Answer:

Graphite is normally only used as the cathode in aluminum electrolysis. This acts as a stable current collector and liquid aluminum is formed on top of this electrode. The actual reduction reaction occurs on the interface between the liquid aluminum and the electrolyte. The graphite cathode is not consumed during the electrolysis process.

Explanation: