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प्रश्न
Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
पर्याय
`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.
उत्तर
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.
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संबंधित प्रश्न
Roasting of sulphide ore gives the gas (A).(A) is a colourless gas. Aqueous solution of (A) is acidic. The gas (A) is ____________.
Match items in Column – I with the items of Column – II and assign the correct code.
| Column – I | Column – II |
| A. Cyanide process | (i) Ultrapure Ge |
| B. Froth floatation process | (ii) Dressing of ZnS |
| C. Electrolytic reduction | (iii) Extraction of Al |
| D. Zone refining | (iv) Extraction of Au |
| (v) Purification of Ni |
Which one of the following ores is best concentrated by the froth floatation method?
Which of the following is used for concentrating ore in metallurgy?
The incorrect statement among the following is
Which type of ores can be concentrated by the froth floatation method? Give two examples for such ores.
Describe the role of the following in the process mentioned.
Silica in the extraction of copper.
Describe the role of the following in the process mentioned.
Sodium cyanide in froth floatation.
In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?
Which of the following ore is concentrated using group 1 cyanide salt?
