Consider thefollowingmetallurgical operations for twoores of copper(X) and(Y).X overset ("Calcination")to"Black ppt." (C ) +CO_2+H _ 2 OY overset ("Roasting") to "Metal M"+"Gas(G)"Identify(X),(Y),(Z), (M) and(G).

Consider thefollowingmetallurgical operations for twoores of copper(X)

1.	Consider thefollowingmetallurgical operations for twoores of copper(X) and(Y).X overset ("Calcination")to"Black ppt." (C ) +CO_2+H _ 2 OY overset ("Roasting") to "Metal M"+"Gas(G)"Identify(X),(Y),(Z), (M) and(G).
Answer» Solution :Sincecalcinationproduces in additiontometaloxide (C ), i.e., CUO, `CO_ 2 andH_2 O`, therefore, THEORE (X)maybebasiccoppeercarbonate or Malachite. ` underset ("Basic copper carbonate (X) or Malachite") (CuCO_ 3 .Cu (OH)_ 2 )overset (Delta) tounderset ("Cupricoxide (C )")( 2CuO)+CO _ 2uparrow+H_ 2 O` Since roasting ore (Y)producescoppermetal(M),therefore, ore(Y) may becuprous sulphide, chalcociteor copperglance `(Cu_ 2 S)`. ` Cu_2S `isfirstpartiallyoxidisedto`Cu_2 O `whichthenreactswiththeremaining`Cu_2 S`to formcoppermeetal(M) and `SO _ 2`asgas` (G) `. ` underset("Copper glance")(2 Cu_2S) +3 O _ 2to2 Cu _2O +2SO_ 2 ,2 Cu_2O+Cu _ 2 S tounderset ("Copper(M)") (6 Cu)+SO_2` THUS,ore (X) is malachite, ore (Y) is copper glance, compound(C ) isculpricoxide,metal(M)iscopperandgas (G) is SULPHURDIOXIDE `(SO_2) `.