IIT-JEE Exam

Iron is removed from chalcopyrite as
(A) FeO (B) FeS
(C) Fe2O3 (D) FeSiO3

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IIT-JEE Other Question

Partial roasting of chalcopyrite produces
(A) Cu2S and FeO (B) Cu2O and FeO
(C) CuS and Fe2O3 (D) Cu2O and Fe2O3 In self–reduction, the reducing species is
(A) S (B) O2−
(C) S2− (D) SO2