Question

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

Options

• `Δ"G"_"f"^0` of sulphide is greater than those for CS₂ and HS₂.

• `Δ"G"_"f"^0` is negative for roasting of sulphide ore to oxide.

• Roasting of the sulphide to its oxide is thermodynamically feasible.

• Carbon and hydrogen are suitable reducing agents for metal sulphides.

Answer 1

Carbon and hydrogen are suitable reducing agents for metal sulphides.

Explanation:

Because the `Δ"G"_"f"^0` of metal sulphide is greater than that of CS₂ and H₂S formed as a result of reduction, neither C nor H₂ are suitable for reducing sulphide.