Suggest a condition under which magnesium could reduce alumina. – InterviewSolution

1.	Suggest a condition under which magnesium could reduce alumina.
Answer» The two equations are : a) `(4)/(3)Al+O_(2)rarr(2)/(3)Al_(2)O_(3)" b) "2Mg+O_(2)rarr2MgO` At the point of intersection of the `Al_(2)O_(3)` and MgO curves (marked 'A' in Ellingham diagram), the `DeltaG^(Theta)` becomes ZERO for the reaction : `(2)/(3)Al_(2)O_(3)+2Mg rarr 2MgO +(4)/(3)Al` Below that point magnesium can reduce alumina.

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