Copper isthemistnobleoffirstrow transitionmetalsandoccursinsmalldepositsinseveralcountries.Oresofcopperinclude chalcanthite(CuSO_4. 5H_ 2O ) ,atacamite(Cu_2Cl (OH) _3 ),cuprite(Cu_ 2 O ), copperglance(Cu_ 2S),andmalachite(Cu_2 (OH)_2CO_3 ) . However, 80 % oftheworldcopperproductioncomesfrom theorechalcopyrite(CuFeS_2) . The extraction ofcopper from chalcopyrite involvespartialroasting,removalofironandself - reductionPartialroastingof chalcopyriteproduces

Copper isthemistnobleoffirstrow transitionmetalsandoccursinsmalldeposi

1.	Copper isthemistnobleoffirstrow transitionmetalsandoccursinsmalldepositsinseveralcountries.Oresofcopperinclude chalcanthite(CuSO_4. 5H_ 2O ) ,atacamite(Cu_2Cl (OH) _3 ),cuprite(Cu_ 2 O ), copperglance(Cu_ 2S),andmalachite(Cu_2 (OH)_2CO_3 ) . However, 80 % oftheworldcopperproductioncomesfrom theorechalcopyrite(CuFeS_2) . The extraction ofcopper from chalcopyrite involvespartialroasting,removalofironandself - reductionPartialroastingof chalcopyriteproduces
Answer» `Cu_ 2S`and FeO ` Cu_ 2 O`and FE O CuS and`Fe_2O_ 3` `Cu_2Oand Fe_2 O _ 3` Solution :Duringpartialroasting,` CuFe S _ 2`is firstconvertedinto amixtureof` Cu_ 2S` and FeS.Further,sinceironis morereactivethanCu, therefore, FeS ispreferentiallyoxidisedtoFeO. THUS,partialroastingofchalcopyriteproduces` Cu_2S `andFeO. ` underset ("Chalcopyrite")( 2Cu Fe S_ 2 )+O_2overset (DELTA ) to Cu_ 2S +2 Fe S +SO_2` ` 2 FeS +3 O_2 overset (Delta ) TO2 FeO+2 SO_2` Thus,option (a) iscorrect.