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(B) The extraction of metals from their ores involves several steps such as concentration,roasting/calcination,reduction,and refining.$A$. $ZnCO_3 \ri

Vedclass · Accepted Answer

$CuFeS_2$ $\rightarrow$ $Cu$ (Pure)

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(B) The extraction of metals from their ores involves several steps such as concentration,roasting/calcination,reduction,and refining.$A$. $ZnCO_3 \rightarrow Zn$ involves calcination followed by reduction ($2$ steps).$B$. $CuFeS_2 \rightarrow Cu$ involves concentration,roasting,smelting,bessemerization,and electrolytic refining (more than $2$ steps).$C$. $PbS \rightarrow Pb$ involves roasting followed by reduction ($2$ steps).Since $CuFeS_2$ extraction involves multiple complex steps including concentration,roasting,smelting,and refining,it clearly involves more than two metallurgical processes.

List-$I$	List-$II$
$(i)$ Explosive	$(A)$ $NaN_3$
$(ii)$ Artificial gem	$(B)$ $Fe_3O_4$
$(iii)$ Self reduction	$(C)$ $Sn$
$(iv)$ Magnetic material	$(D)$ $Al_2O_3$
	$(E)$ $Pb(N_3)_2$
	$(F)$ $Fe_2O_3$
	$(G)$ $Cu$
	$(H)$ $SiC$

Which of the following changes involve more than two metallurgical processes?

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