Assertion: Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Reason: MgO curve lies above Al2O3 curve in Ellingham diagram.

Question

Assertion: Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Reason: MgO curve lies above Al2O3 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

Tardigrade Admin · Accepted Answer

The curve for MgO lies below Al2O3 in Ellingham diagram for an appreciable range of temperature and in that temperature range magnesium can reduce Al2O3, but this process is uneconomical hence, it is not used to reduce alumina,

Q. Assertion : Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium.
Reason : $M g O$ curve lies above $A l_{2} O_{3}$ curve in Ellingham diagram.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

The curve for $M g O$ lies below $A l_{2} O_{3}$ in Ellingham diagram for an appreciable range of temperature and in that temperature range magnesium can reduce $A l_{2} O_{3}$ , but this process is uneconomical hence, it is not used to reduce alumina,

Q. Assertion : Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Reason : MgO curve lies above Al2​O3​ curve in Ellingham diagram.