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"_"r"^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:

Both C and H₂ are not suitable for reducing sulphide are because `Δ"G"_"f"^0` of metal sulphide is more than that of CS₂ and H₂S which be formed as result of reduction.