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The element or compounds of the metals w...

The element or compounds of the metals which occur in nature in the earth's crust are called:

A

metal ores

B

ores

C

minerals

D

metalloids

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VGS PUBLICATION-BRILLIANT-PRINCIPLES OF METALLURGY-EXERCISE
  1. A process in which the ore is strongly heated in the absence of air or...

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  2. The process of extraction of metals from their ore is called.

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  3. The element or compounds of the metals which occur in nature in the ea...

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  4. Alumium is profitable to extract from

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  5. What are chalcogens? Why are they so called?

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  6. The metal never found in free state is

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  7. The element that does not displace hydrogen from dilute acids is

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  8. To extract the metal, the metallic oxide with

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  9. High reactivity metals are extracted by of their fused compounds.

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  10. Thermite process involve the reaction of metal oxides with

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  11. Suitable impurities are added to the ore to decrease its

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  12. The displacement reactions involving high reactive metals are highly

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  13. The process of obtaining the pure metal from the impure metal is calle...

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  14. The method adopted to purify low melting metals by heating and making ...

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  15. is the method the required metal gets deposited at the cathode.

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  16. Tarnishing of silver is due to formatio of

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  17. Development of green coating on copper is due to

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  18. The electrolyte used in refinery of copper is

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  19. Auto reduction possible withores.

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  20. is used to carry out pyrochemical process.

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