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Question

Carbon reduction process is not commercially applicable for which of the following set of oxides to extract the respective metal?

(I) ZnO (II) Fe2O3 (III) Al2O3 (IV) SnO2 (V) MgO

A
ZnO,Fe2O3,SnO2
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B
ZnO,SnO2,MgO
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C
MgO,Al2O3
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D
MgO,SnO2,Al2O3,
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Solution

The correct option is C MgO,Al2O3
Carbon reduction process is used to reduce less electropositive metals. Mg and Al have high electropositivity.

MgO+Cat high temp−−−−−−20000CMg+CO

It is possible at high temperatures, so it is not used for commercial purposes.

Hence, cannot be extracted from oxides through the carbon reduction process.

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