Question

Which of the following statements about the advantage of roasting of sulphide ore before reduction are true?
I. $\Delta G_f^{\circ }$ is negative for roasting sulphide ore to oxide.
II. $\Delta G_f^{\circ }$ of the sulphide ore is greater than $H_{2}S$ and $C{S}_2$.
III. Carbon and hydrogen are suitable reducing agents for metal sulphides.
IV. Roasting of the sulphide to oxide is thermodynamically feasible.
Choose the option with all true statements.

• A. I, II and III
• B. II, III and IV
• C. I, III and IV
• D. I, II and IV

Answer 1

Answer: (D)

$C$ and $H$ are suitable reducing agents for metal oxides.