1.

Is it true that under certain conditions, `Mg` can reduce `SiO_(2)`, and `Si` can reduce `MgO` ?

Answer» (i) `SiO_(2) + 2Mg rarr Si + 2MgO`
Well-powdered quartz is mixted with magnesium and heated in a fire clay crucible along with some quantify of calcined magnesia.
(ii) `2MgO overset(2000^@C)rarr SiO_(2) + 2Mg`.


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