Which of the following statements about the advantage of roasting of sulphide ore before reduction is not true?
ΔfGΘ of the sulphide is greater than CS2 and H2S
ΔfGΘ is negative for roasting of sulphide ore to oxide
Roasting of the sulphide to oxide is thermodynamically feasible
Carbon and hydrogen are suitable reducing agents for metal sulphides
ΔfGΘ for sulphides >ΔfGΘ for CS2 and H2S and thus C and H2
cannot reduce metal sulphide.