The correct statement regarding the given Ellingham diagram is
Select the correct option:
A
At $800^{\circ} \mathrm{C}, \mathrm{Cu}$ can be used for the extraction of Zn from ZnO
B
At $500^{\circ} \mathrm{C}$, coke can be used for the extraction of Zn from ZnO
C
At $1400^{\circ} \mathrm{C}, \mathrm{Al}$ can be used for the extraction of Zn from ZnO
D
Coke cannot be used for the extraction of Cu from $\mathrm{Cu}_2 \mathrm{O}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
In the Ellingham diagram, the metal which has a lower value of $\Delta \mathrm{G}^{\circ}$ (more negative) can reduce a metal oxide whose curve lies above it so, Al can reduce ZnO at $1400^{\circ} \mathrm{C}$
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