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ZnO can be reduced to the metal by heati...

`ZnO` can be reduced to the metal by heating with carbon but not `Cr_(2)O_(3)`. Justify your answer.

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Carbon has more affinity for oxygen than zinc, whereas chromium has higher affinity for oxygen than zinc. Hence `ZnO` can be reduced to the metal by heating with carbon but not `Cr_(2)O_(3)`.
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