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Which of the following statements, about...

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

A

Roasting of the sulphide to the oxide is thermodynamically feasible.

B

Carbon and hydrogen are suitable reducing agents for metal sulphides.

C

The ` Delta _ f G ^(@) ` of the sulphide is greater then those for ` CS_ 2 and H_2S `

D

The ` Delta_fG^(@) ` is negative for roasting of sulphide ore to oxide.

Text Solution

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The correct Answer is:
B
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PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -COMPETITION FOCUS (JEE(Main and Advanced)/MEDICAL ENTRANCE SPECIAL) MULTIPLE CHOICE QUESTIONS (I)
  1. When limestone is heated CO(2) gas is liberated. In metallurgy, this p...

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  2. Which of the following faction is of no significance for roasting sul...

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  3. Which of the following statements, about the advantage of roasting of ...

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  4. In view of the signs of Delta(r)G^(@) for the following reactions : ...

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  5. Delta G^(@) vs T plot in the Ellingham's diagram slopes downward fo...

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  6. According to Ellingham diagram the oxidation reaction of carbon and ca...

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  7. Which series of reactions correctly represents chemical rections relat...

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  8. The following reaction take place in the blast in the proparation of i...

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  9. Identify the reaction that does not take place in a blast furnace

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  10. which of the following electronts is present as the impurity to the m...

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  11. When copper pyrites is roasted in excess of air, a mixture of CuO + Fe...

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  12. Roasted copper pyrite on smelting with sand produces

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  13. The composition of 'copper matte' is

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  14. Copper is extracted from copper pyrites by heating in a besseme...

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  15. Heating mixture of Cu(2)Oand Cu(2)S will give

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  16. In the exteraction of copper from its sulphide ore, the metal is fanal...

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  17. Extraction of zinc from zinc blende is achieved by

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  18. The method chiefly used for the extraction of lead and tin from there ...

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  19. The auto reduction process is not used in the metallurgy of

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  20. Cryolite is:

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