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A process in which the ore is strongly h...

A process in which the ore is strongly heated in the absence of air or oxygen is

A

buring

B

roasting

C

purification

D

calcination

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VGS PUBLICATION-BRILLIANT-PRINCIPLES OF METALLURGY-EXERCISE
  1. The method suitable for purification of low boiling metals is

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  2. The corrosion of iron object is favoured by

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  3. A process in which the ore is strongly heated in the absence of air or...

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

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

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  6. Alumium is profitable to extract from

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

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  8. The metal never found in free state is

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

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  10. To extract the metal, the metallic oxide with

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

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  12. Thermite process involve the reaction of metal oxides with

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

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  14. The displacement reactions involving high reactive metals are highly

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

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

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

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  18. Tarnishing of silver is due to formatio of

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  19. Development of green coating on copper is due to

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  20. The electrolyte used in refinery of copper is

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