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Which of the following statements about ...

Which of the following statements about the 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^(Ө)` is negative for roasting of sulphide ore to oxide

D

The `Delta_(f)G^(Ө)` of the sulphide is greater than those for `CS_(2)` and `H_(2)S`

Text Solution

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The correct Answer is:
B
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CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (Single Correcttype)
  1. Which of the following reactions taking place in the blast furnace dur...

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  2. The ore having two different metal atoms is

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  3. Which of the following statements about the reduction is not true ?

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  4. Among the metals Cr,Fe,Mn,Ti,Ba, and Mg, the one that cannot be obtain...

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  5. Extraction of iron from zine blende is achieved by

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

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  7. The incorrect statement among the following is

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  8. Auto-reduction process is used for the extraction of :

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  9. Bauxide ore is made up of Al(2)O(3) + SiO(2) + TiO(2) + Fe(2) O(3). Th...

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

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  11. Native silver metel froms a water solube, complesx with a dilute aqueo...

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

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  13. The incorrect statement is

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  14. Composition of malachite mineral is

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  15. Select the correct statement :

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  16. Elingham diagram represents.

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  17. To carry out a reduction process, select a temperature so as to make

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  18. Gold is extracted by hydrometallurgical procees based on its property

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  19. van Arkel method of purification of metals involves converting the met...

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  20. DeltaG^(@) vsT plot in the Ellingham diagram slopes down for the react...

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