MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryMetallurgyPrevious Year Questions

The metal oxide which cannot be reduced to metal by carbon is (Karnataka NEET 2013)

A.Al₂O₃✓ Correct

B.PbO

C.ZnO

D.Fe₂O₃

Explanation

Oxides of less reactive metals (like PbO, ZnO, Fe₂O₃) can be reduced by carbon. While oxides of very reactive metals (like Al₂O₃) can be reduced only by the electrolytic method.

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