The correct statement regarding the given Ellingham diagram is :
At , coke can be used for the extraction of Zn from ZnO
At , Al can be used for the extraction of Zn from ZnO
At , Cu can be used for the extraction of Zn from ZnO.
Coke cannot be used for the extraction of Cu from .
Ellingham Diagram -
Ellingham diaghram normally consists of plots of Vs T for the formation of oxides of elements.
- wherein
2xM(s)+O2(g) 2MxO(s)
Reduction of Metal Oxide to Metal -
The crude metal is obtained when the roasted ore or calcined ore is put to reduction by using a suitable reducing agent.
- wherein
HgO+HgS 3Hg+SO2
Smelting or Reduction with Carbon -
This involves reduction of ore to the molten metal at a high temperature.
Roasted or calcined ore is mixed with suitable quantity of coke or charcoal which act as reducing agent and is heated to high temperature above its melting point.
- wherein
For extraction of less electropositive metals such as Pb, Zn, Fe,Sn etc by powerful reducing agents such as C, H2, CO, Watergas,Na,K,Mg, Al may be used.
MxOy +yC xM +yCO
From the diagram, Al can reduce ZnO to Zn
At , coke can be used for the extraction of Zn from ZnO
Option 2)At , Al can be used for the extraction of Zn from ZnO
Option 3)At , Cu can be used for the extraction of Zn from ZnO.
Option 4)Coke cannot be used for the extraction of Cu from .
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