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Assertion : Magnesium metal is not used ...

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.

Text Solution

Verified by Experts

The correct Answer is:
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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