Question:
which of the following reduction reaction CANNOT be carried out with coke?
Correct Option: 1
Solution:
Reduction of $\mathrm{Al}_{2} \mathrm{O}_{3} \rightarrow \mathrm{Al}$ is carried out by electrolytic reduction of its fused salts.
$\mathrm{ZnO}, \mathrm{Fe}_{2} \mathrm{O}_{3} \& \mathrm{Cu}_{2} \mathrm{O}$ can be reduce by carbon.