Chemistry-
General
Easy
Question
Aluminium is produced on a large scale by electrolysis of alumina, dissolved in fused cryolite and a little fluorspar. These two electrolytes, cryolite and fluorspar are respectively
- (a)
and 
- To bring the impurities to surface and oxidize them
- (c) To increase the carbon content of copper
- To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood
and The correct answer is: To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood
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