Question

name the other aluminium containing compound added to
alumina and state its significance
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Answer 1

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.

Explanation:

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