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Considering Ellingham diagram, which of ...

Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

A

`Fe`

B

`Zn`

C

`Mg`

D

`Cu`

Text Solution

Verified by Experts

The correct Answer is:
C
Magneisum is most electropositive element amoug the options given as per the `DeltaG^(@)`values of `MgO`and `A1_(2)O_(3)`oxides in Ellingham diargam.
`3Mg+A1_(2)O_(3)rarr2A1 +3MgO`
`Mg`has more `-DeltaG`value then alumina. So it will in the lower part of Ellinghram diagram. Metals which has more `-DeltaG`value can reduce those metals oxide which has less `-DeltaG` value.
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