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CBSE Class 12-science Answered

the graphite electrode in extraction of  Al by Hall Heroults process need to be changed freuently why 
Asked by niharikapabba2605 | 07 Aug, 2018, 11:33: AM
answered-by-expert Expert Answer
During the electrolysis in the extraction of Al by Hall Heroults process, aluminum is deposited at the cathode and oxygen is liberated at the anode which reacts with carbon in the graphite to form carbon-dioxide, so carbon is burnt away. thus the anode has to be replaced periodically.
Answered by Ramandeep | 07 Aug, 2018, 02:42: PM
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