The metal oxide which cannot be reduced to metal by carbon is ...… - Vidyadip

MCQ

The metal oxide which cannot be reduced to metal by carbon is $......$

A
$\text{ZnO}$
B
$\ce{Fe_2O_3}$
C
$\text{PbO}$
✓
$\ce{Al_2O_3}$

✓

Answer

Correct option: D.

$\ce{Al_2O_3}$

Reduction of the oxide with carbon at high temperature is known as smelting. The oxides of less electropositive metals like $\text{Pb, Zn, Fe, Sn, Cu}$ etc. are reduced by strongly heating them with coal or coke, in the blast furnace.
So among the given options only $\ce{Al_2O_3}$ cannot be reduced by carbon.

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