A) Reducing \[A{{l}_{2}}{{O}_{3}}\] with coke
B) Electrolysing \[A{{l}_{2}}{{O}_{3}}\] dissolved in \[N{{a}_{3}}Al{{F}_{6}}\]
C) Reducing \[A{{l}_{2}}{{O}_{3}}\] with chromium
D) Heating alumina and cryolite
Correct Answer: B
Solution :
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