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Which metalls) is (are) generally found...

Which metalls) is (are) generally found in native state?

A

Fe

B

Co

C

Au

D

Na

Text Solution

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The correct Answer is:
C
Metals like Ag, Cu, etc are available in free state.
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AAKASH SERIES-METALLURGY-LEVEL-II (LECTRURE SHEET) (EXERCISE-I)
  1. Which of the following ores is/are oxide ones)?

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  2. Which metalls) is (are) generally found in native state?

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

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

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

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  6. Hydrometallurgy is useful in the extraction of

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  7. The metal obtained by self reduction process is

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  8. The ore concentrated by electromagnetic separation is

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  9. Ellingham diagram does not represents

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

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  11. The extraction of metals from oxide ores involve

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

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  13. Roosting is carried out to

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

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  15. Roasting of copper pyrites is done

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

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

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

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

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  20. The disadvantages of carbon reduction method are:

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