A) minimise the heat loss due to radiation
B) protect aluminium produced from oxygen
C) dissolve bauxite and render it conductor of electricity
D) lower the melting point of bauxite
Correct Answer: C
Solution :
Cryolite \[(N{{a}_{3}}Al{{F}_{6}})\] is added to alumina for its electrolysis to decrease its melting point and also to increase its conductivity.
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