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At 1250 K 2FeO(s)to2Fe(s)+O(2)(g), Del...

At `1250 K`
`2FeO(s)to2Fe(s)+O_(2)(g)`, `DeltaG=+320kJmol^(-1)` of `O_(2)`
`2C(s)+O_(2)(g)to2CO(g)`, `DeltaG=-430 kJ mol^(-1)` of `O_(2)`
The following coupled reaction is spontaneous because
`2FeO(s)+2C(s)to2Fe(s)+2CO(g)`

A

ln `1st` reaction entropy is increasing

B

ln `2nd` reaction entropy is increasing

C

`DeltaG` of the net reaction is negative

D

All of these

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The factor of DeltaG values is important in metallurgy. The DeltaG values for the following reactions at 800°C are given as : S_(2)(s) + 2O_(2)(g) to 2SO_(2)(g), DeltaG =-544 kJ 2Zn(s) + S_(2)(s) to 2ZnS(s), DeltaG=-293 kJ 2Zn(s) + O_(2)(g) to 2ZnO(s), DeltaG = -480 kJ Calculate the DeltaG for the reaction: 2ZnS(s) + 3O_(2)(g) to 2ZnO(s) + 2SO_(2)(g)

AAKASH INSTITUTE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Objective type Questions (One option is correct)
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  2. Which of the following is used to reduce TiCl(4) to Ti ?

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  3. At 1250 K 2FeO(s)to2Fe(s)+O(2)(g), DeltaG=+320kJmol^(-1) of O(2) 2...

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  5. Which of the following statement is correct w.r.t. the following graph...

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  6. In Ellingham diagrams of DeltaG oxide formation Vs T, which of the fol...

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  7. On Ellingham diagrams if two graphs intersect each other, what does th...

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  8. Which of the following is incorrect w.r.t. metallurgy of iron in the b...

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  9. Which of the following has the lowest percentage of carbon in it?

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  10. Which furnace is used for the extrction of iron from haematite ?

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  11. Roasting of sulphide ore is generally performed in

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  12. The final stage of self reduction for the extraction of Cu is carried ...

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  13. Zinc is extracted from zinc oxide by its reaction with coke in

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  14. Which of the following metal is leached by Cyanide process

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  15. Poiling process is used for:

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  16. Impure zince, as collected from earthen clay retort, is called

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  17. During smelting, an additional substance is added which combines with ...

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  18. Sulphide ores of metals are usually concentrated by both floatation pr...

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  19. Heating pyrities in air to remove sulphur is called

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  20. Extraction of zince from zinc blende is achieved by

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