A) extraction of\[Al\]
B) purification of \[A{{l}_{2}}{{O}_{3}}\]
C) refining of \[Al\]
D) extraction of\[Ag\]
E) none of the above
Correct Answer: A
Solution :
Hall and Heroults process is used for extraction ofAl from\[A{{l}_{2}}{{O}_{3}}\].
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