1.

Carbon reduction process is not commercially applicable for which of the following set to oxides to extract the respective metal ? (I) `ZnO` (II) `Fe_(2)O_(3)` (III) `Al_(2)O_(3)` (IV) `SnO_(2)` (V) `MgO`.A. `ZnO,Fe_(2)O_(3),SnO_(2)`B. `ZnO,SnO,MgO`C. `MgO,Al_(2)O_(3)`D. `MgO,SnO,Al_(2)O_(3)`

Answer» Correct Answer - C
`MgO + C overset("At high temp.") underset(2000^@ C)rarr Mg + CO`.


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