Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
- The $\Delta G^{\circ}_f$ of the sulphide is greater than those for $CS_2$ and $H_2S$.
- The $\Delta G_f^{\circ}$ is negative for roasting of sulphide ore to oxide.
- Roasting of the sulphide to the oxide is thermodynamically feasible.
- Carbon and hydrogen are suitable reducing agents for metal sulphides.
The Correct Option is D
Solution and Explanation
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Notes on General Principles and Processes of Isolation of Elements
Concepts Used:
General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal