Question

name the other aluminium containing compound added to alumina and state its significance​

Answer 1

$\huge\rm\underline\red{ANSWER:-}$

Molten cryolite acts as solvent for alumina,lowers the fusion temperature from 2050oC to 950oC and enhances conductivity. (ii) Al3+ + 3e- ----> Al. (iii) During electrolysis oxygen gas is formed at anode which oxidises graphite anode to carbon dioxide, so it is necessary to replace anode periodically.