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  4. In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

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Q. In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

JEE MainJEE Main 2023General Principles and Processes of Isolation of Elements

Solution:

The copper ore contains iron, it is mixed with silica before heating in reverberatory furnace. $FeO$ slags off as $FeSiO _3$.
$FeO + SiO _2 \longrightarrow FeSiO _3$