The given sketch of an electrolytic cell used in the extraction of a

1.	The given sketch of an electrolytic cell used in the extraction of aluminium:(i) What is the substance of which the electrode A and B are made ? (ii) At which electrode (A ro B) is the aluminium formed ? (iii) What are the two aluminium compound in the electrolyte C ? (iv) Why is it necessary for electrode B to be continuously replaced ?
Answer» (i) Carbon (Graphite) (ii) A (iii) Aluminium oxide / Alumina / cryolite (sodium aluminium fluoride). (iv) Burns away in the presence of oxygen produced or consumed.

The given sketch of an electrolytic cell used in the extraction of aluminium:(i) What is the substance of which the electrode A and B are made ? (ii) At which electrode (A ro B) is the aluminium formed ? (iii) What are the two aluminium compound in the electrolyte C ? (iv) Why is it necessary for electrode B to be continuously replaced ?

Answer»

(i) Carbon (Graphite)

(ii) A

(iii) Aluminium oxide / Alumina / cryolite (sodium aluminium fluoride).

(iv) Burns away in the presence of oxygen produced or consumed.