Exams › JEE Advanced › Chemistry
Which of the following metal oxides are NOT commercially reduced by the carbon reduction method?
- Cr2O3
- Mn3O4
- ZnO
- Both (1) and (2)
Correct answer: Both (1) and (2)
Solution
ZnO is reduced by carbon commercially in electric arc furnaces. Cr2O3 cannot be reduced by carbon commercially because carbon forms stable chromium carbides and the reduction requires very high temperatures; aluminothermy is used instead. Similarly, Mn3O4 is produced via aluminothermy for pure metal. Hence both Cr2O3 and Mn3O4 are not commercially reduced by carbon.
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