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A mineral is called ore if……....

A mineral is called ore if…….

A

the metal can be extracted from it

B

the metal is costly

C

a metal can be profitably extracted from it

D

a metal cannot be extracted from it.

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BEYOND PUBLICATION-PRINCIPLES OF METALLURGY-EXERCISE
  1. Which of the following alloys does not contain copper

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

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  3. A mineral is called ore if…….

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

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  5. Specific gravity of slag is always :

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  6. Polling process is employed for the removal of

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

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

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

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

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

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  12. Rusting of iron takes place in

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  13. The principle behind froth floatation is :

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  14. In Goldschmit alumino thermic process, thermite mixture is :

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  15. In the metallurgical extraction of iron, which of the following proces...

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  16. During the electrolysis of molten salts, the metals are always produce...

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  17. Arrange the following metals in the order of their decreasing reactivi...

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  18. The corrent decreasing order of the reactivity of the metals : Fe, Co,...

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  19. Roosting is carried out to

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  20. Which is correct in the following ?

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