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Q.

According to Ellingham diagram the oxidation reaction of carbon and carbon monoxide may be used to reduce which one of the following oxides at the lowest temperature?

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a

Al2O3

b

Cu2O

c

MgO

d

ZnO

answer is B.

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Detailed Solution

Because ∆G° for reductions of rest three oxides Al2O3, ZnO and MgO] are less negative than that of Cu2O at lower temperature.
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