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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