Question

______ CANNOT be reduced by C. 

Options

• \[\ce{Fe2O3}\]

• \[\ce{Al2O3}\]

• \[\ce{PbO}\]

• \[\ce{ZnO}\]

Answer 1

\[\ce{Al2O3}\] CANNOT be reduced by C. 

Explanation:

Carbon cannot decrease the oxides of particularly reactive metals like aluminium. They are ineffective for reduction because they are highly reactive and react with carbon to create carbides.