Carbon cannot be used as a reducing agent to obtain magnesium oxide. Why?
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Carbon can\’t be used as reducing agent for MgO because Magnesium is high in the reactivity series and metals high in the reactivity series have more affinity for oxygen than carbon.It is done by an electrolytic process.Cu is obtained in two steps:1) first heating the sulphide ore in the presence of oxygen to get copper oxide.2) then heating the oxide with the sulphide as reducing agent to get Copper.\xa0
From its oxides
Bcoz mg is a highly reactive metal which cant be reduced by carbon