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For which one the following reaction De...

For which one the following reaction `Delta S` is positive

A

`2Zn_((s)) +O_(2(g)) to 2 ZnnO_((s))`

B

`2C_((S)) +O_(2(g)) to 2CO_((g))`

C

`2CO_((g)) +O_(2 (g) ) to 2CO_(2(g))`

D

`4Al_((s)) +3O_(2(g)) to 2Al_2 O_(3(s))`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. In oxidisin roasting of Zn, S porducts are

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  2. Ag(2)S or in mixed with NaCl and heated to 6000^(@) in the presence o...

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  3. For which one the following reaction Delta S is positive

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  4. For which one of the followinng reaction Delta G decreases with ...

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  5. For which one of the following reaction , the graph of Delta ...

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  6. The least stable oxide at room temperature is

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  7. Ni + CO overset(330-350 K)to Ni(CO)(4) No(CO)(4) overset(450-470K) ...

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  8. The process of zone refining is used for

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  9. The process used in the refining of aluminimum and zinc metals ...

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  10. In the metallurgy of which of the following supellation process ...

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  11. In zone - Refining method the molten zone :

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  12. Tin and lead can be refined by

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  13. Silver containing lead as an impurity is not purified by

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  14. The main ore of iron is its

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  15. Mark the wrong statement among the following. The iron ore after washi...

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  16. Most abundant ore of iron is

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  17. The reducing agent added in the extraction of Iron from oxide ore of i...

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  18. The iron obtained from blast funace is

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  19. In the middle part of blast furnace, iron ore is treated with lime sto...

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  20. In the manufacture of iron from haematite, the limestone acts as

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