Question

(a) During electrolysis of molten alumina :
(i) Why electrolytic mixture is covered with coke or saw dust.
c) Why carbon anodes are periodically replaced.
At which electrode is aluminium obtained. Give equation for the formation
of aluminium.
(iv)Name the chemical with which bauxite is reacted in the Baeyer's process.​

Answer 1

Answer:

a.i.

Powdered coke is sprinkled over the surface of the electrolytic mixture: Reduces heat loss by radiation. Prevents burning of the anode..