Which of the following are the by-products NO | vedclass

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(D) In the extraction of copper from copper pyrites $(CuFeS_2)$,the following by-products are obtained:$1$. Gold and silver are recovered from the ano

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$FeSO_4$ which is used to prepare green vitriol

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(D) In the extraction of copper from copper pyrites $(CuFeS_2)$,the following by-products are obtained:$1$. Gold and silver are recovered from the anode mud during electrolytic refining.$2$. $FeSiO_3$ (iron silicate) is formed as slag,which is used in road making.$3$. $SO_2$ gas is released,which is captured and used for the manufacture of $H_2SO_4$ by the contact process.$4$. $FeSO_4$ (ferrous sulfate) is $NOT$ a by-product obtained in the extraction of copper. Therefore,option $D$ is the correct answer.

List-$I$ (Substances)	List-$II$ (Processes)
$A$. Sulphuric acid	$i$. Haber's process
$B$. Steel	$ii$. Bessemer's process
$C$. Sodium hydroxide	$iii$. Leblanc process
$D$. Ammonia	$iv$. Contact process

Which of the following are the by-products $NOT$ obtained in the extraction of copper?

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