1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the following statements about the advantage of roasting of sulphide ore before reduction are true? I. Δ Gf° is negative for roasting sulphide ore to oxide. II. Δ Gf° of the sulphide ore is greater than H 2 S and CS 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.

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Q. 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 $CS _{2}$.
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.

General Principles and Processes of Isolation of Elements

Solution:

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