Assertion : Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Reason : `MgO` curve lies above `Al_(2)O_(3)` cur
Assertion : Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium.
Reason : `MgO` curve lies above `Al_(2)O_(3)` curve in Ellingham diagram.
A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. if both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.
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Correct Answer - C
The curve for MgO lies below `Al_(2)O_(3)` in Ellingham diagram for an appreciable range of temperature and in that temperature range magnesium can reduce `Al_(2)O_(3)` , but this process is uneconomical hence, it is not used to reduce alumina.
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