1.

The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270kg of Al metal from bauxite by Hall process is:

Answer»

270kg
540kg
90kg
180kg

Solution :`underset(3xx12g)(3C)+2Al_(2)O_(3)rarrunderset(4xx27=108g)(4Al+3CO_(2))`
`because` 108g Al is produced by consuming =36G carbon
`therefore 270xx10^(3)g` Al will be produced by consuming
`=(36)/(108)xx270xx10^(3)g` of carbon
`=90xx10^(3)g`=90 kg carbon.


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