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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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${Al}_{2} O_{3}$

${Cu}_{2} O$

$MgO$

$ZnO$

answer is B.

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Detailed Solution

Because ${ΔG}^{o}$ for reductions of rest three oxides $[{Al}_{2} O_{3}, ZnO and MgO]$ are less negative than that of ${Cu}_{2} O$ at lower temperature.

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