Which of the following statements about the advantage of roasting of sulphide ore before reduction is not true?

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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

answer is D.

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Detailed Solution

ΔfGΘ for sulphides >ΔfGΘ for CS2 and H2S and thus C and H2cannot reduce metal sulphide.

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