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Which one of the following elements occu...

Which one of the following elements occur in free state

A

Phosphorus

B

Sulphur

C

Silicon

D

Gold

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BEYOND PUBLICATION-PRINCIPLES OF METALLURGY-EXERCISE
  1. The correct observation made by the student after putting clean pieces...

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  2. Which of the following metals can replace copper from a solution of co...

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  3. Which one of the following elements occur in free state

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  4. The reactivity of metals Al, Ag and Cu increase in the order of

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  5. The second most abundant metal in the earth's crust is

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  6. The process of coating Zn over Fe is known is

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  7. Identify an ore containing sulphur in it.

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  8. Which of the following is an amphoteric oxide ?

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  9. Which is not a sulphide ore of metal ?

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  10. Which of the following alloys does not contain copper

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  11. Which of the following is the least abundant metal in earth's crust ?

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  12. A mineral is called ore if…….

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  13. Concentration by forth floatation is applicable for which of the follo...

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  14. Specific gravity of slag is always :

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  15. Polling process is employed for the removal of

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

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  17. Tamishing of silver is due to the presence of this gas in air……..

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  18. Pyrochemical processes in metallurgy are carried out in structure call...

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  19. The following metal is obtained by the auto reduction of its sulphide ...

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  20. Name the common elements present in the anode mud in the eletrolytic r...

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