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Which of the following processes involve...

Which of the following processes involves the roasting process.

A

`ZnS+3O_(2) to 2ZnO+2SO_(2)`

B

`Fe_(2)O_(3)+3C to 2Fe+3CO`

C

`2PbS+O_(2) to 2PbO+2SO_(2)`

D

`Al_(2)O_(3).2H_(2)O to Al_(2)O_(3) +2H_(2)O`

Text Solution

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The correct Answer is:
A, C
Roasting mcans conversion of sulphide ore into its oxides by heating in presence of air.
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AAKASH SERIES-METALLURGY-LEVEL-II (LECTRURE SHEET) (EXERCISE-I)
  1. Which metalls) is (are) generally found in native state?

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  2. In which of the following pairs, both the minerals are oxides ?

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  3. Which of the following processes involves the roasting process.

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  4. Which of the following metals is leached by cyanide process a

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  5. Hydrometallurgy is useful in the extraction of

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  6. The metal obtained by self reduction process is

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  7. The ore concentrated by electromagnetic separation is

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  8. Ellingham diagram does not represents

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  9. Which of the following process makes the one porous?

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  10. The extraction of metals from oxide ores involve

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  11. Metals which can be extracted by smelting process are:

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  12. Roosting is carried out to

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  13. of the following reduction process, correct processes are:

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  14. Roasting of copper pyrites is done

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  15. Highly electropositive metals can not he extracted by carbon reduction...

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  16. Which one of the following metals can be extracted by aluminothermit p...

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  17. For which of the following metal the carbon reduction cannot be used ?

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  18. The advantages of using carbon to reduce a number of oxides and other ...

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  19. The disadvantages of carbon reduction method are:

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  20. The chemical treatment of the ore for concentration is done in the cas...

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