Answer:
Option B
Explanation:
(i) Hall's process is the major industrial process for smelting aluminium.It involves dissolving aluminium oxide in molten cryolite and electrolysing the molten salt bath.
(ii) Hoope's process or electrolytic refining is used to refine the obtained aluminium metal which is not 100% pure.
(iii) Mond's process is used to refine nickel
(iv) Liquation process is used to refine a metal with low melting point like tin, bismuth, lead , mercury etc.
Thus, option (b) is correct.
