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Most abundant element in the earth's cru...

Most abundant element in the earth's crust by weight is

A

Oxygen

B

Silicon

C

Alluminuim

D

Iron

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The correct Answer is:
A
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. Copper pyrites ore is concentrated by

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  2. Which one of the following is not a method of concentration of ore

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  3. Most abundant element in the earth's crust by weight is

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  4. The rocky and silicious matter associated with an ore is called

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  5. The process of removing of lighter ganse particles by washing in a cur...

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  6. In the froth flotation process for the purification of minerals the pa...

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  7. Froth floatation process for the concentration of ores is an illustrat...

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  8. Gravity separation process may be used for the concentration of

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  9. Wolframite (FeWO(4)) is separated from cassiterite by

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  10. In the extraction of gold ,alluival sand is conectrated by whic...

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  11. Which one of the following is used as conditioner in froth flotation p...

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  12. During extraction of a metal the ore is roasted if it is a

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  13. A common metal that is used for the extraction of some metals from the...

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  14. Extraction of metals from sulphide cres is done by

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  15. To remove basic impurities from the ore the substance generally used i...

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  16. During smelting an additional substance added to form a fusible pro...

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  17. Calcination is the process of heating the ore :

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  18. To which of the following ores, calcination process in not applicable

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  19. Roasting is carried out in case of

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  20. Smelting is usually carried out in

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