Question

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

• A. Roasting of the sulphide to the oxide is thermodynamically feasible
• B. Carbon and hydrogen are suitable reducing agents for metal sulphides
• C. The ${\Delta }_f{G}^0$ of the sulphide is greater than those for $C{S}_2$ and $H_{2}S$
• D. The ${\Delta }_f{G}^0$ is negative for roasting of sulphide ore to oxide

Answer 1

The correct option is A Roasting of the sulphide to the oxide is thermodynamically feasible

In roasting of sulphide are before reduction, carbon and hydrogen are suitable reducing agents, ${△}_f{G}^0$ is negative for roasting of ore. Hence, roasting of sulphide ore is thermodynamically not feasible.