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The correct statement regarding the given Ellingham diagram is : –1050 –600 –300 800ºC 2000ºC 500ºC Temp.(ºC) Δ Gº (kj/mol)

1. Coke cannot be used for the extraction of Cu from Cu 2 O
2. At 500ºC, coke can be used for the extraction of Zn from ZnO
3. At 1400ºC, Al can be used for the extraction of Zn from ZnO
4. At 800ºC Cu can be used for the extraction of Zn from ZnO

Correct answer: At 1400ºC, Al can be used for the extraction of Zn from ZnO

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