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CBSE Class 12-science Answered

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Asked by jain.pradeep | 26 Feb, 2020, 09:59: AM
answered-by-expert Expert Answer
In extraction of aluminium, lining of carbon acts as cathode and graphite acts as anode. During this process, graphite is oxidised in CO and CO2 . 
Chemical reactions are as follows-
A t space c a t h o d e space

A l to the power of plus 3 end exponent space plus 3 e to the power of minus space rightwards arrow A l


A t space a n o d e minus
space C plus O to the power of negative 2 end exponent rightwards arrow C O plus 2 e to the power of minus
C plus 2 O to the power of negative 2 end exponent rightwards arrow C O subscript 2 space end subscript plus 4 e to the power of minus
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