The addition of silica during the extraction of copper from its sulphide ore :-
Solution
Silica is used to remove FeO impurity from the ore of copper<br><br>$FeO + Si{O_2} \to \mathop {FeSi{O_3}}\limits_{iron\,silicate\,(Slag)}$
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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