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General Principles and processes of Isolation of Elements
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The Ellingham diagram for zinc, magnesium and carbon converting into corresponding oxides is shown below. At $1100\,^oC$, which reaction is spontaenous to a maximum extent?
A
$MgO + C \to Mg + CO$
B
$ZnO + C \to Zn + CO$
C
$MgO + Zn \to Mg + ZnO$
D
$ZnO + Mg \to MgO + Zn$
Solution
Any metal will reduce oxide of other metals which lie above it in the Ellingham diagram because free energy change will became more negative and as difference increases more energy will be released and reaction will be more spontaneous.
Standard 12
Chemistry
