[JEE Main Online Paper (Held On 09-Jan-2019 Evening]
A) Coke cannot be used for the extraction of Cu from \[C{{u}_{2}}O\]
B) At\[500{}^\circ C\], coke can be used for the extraction of Zn from \[ZnO\]
C) At\[1400{}^\circ C\], Al can be used for the extraction of Zn from \[ZnO\]
D) At \[800{}^\circ C\] Cu can be used for the extraction of Zn from \[ZnO\]
Correct Answer: C
Solution :
The element which present below in diagram can replace element from oxide which is present above in the diagram. So according to diagram Al can reduce ZnO. \[3ZnO+2Al\,\,\to \,\,3Zn\,\,+\,\,A{{l}_{2}}{{O}_{3}}\]
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