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When limestone is heated, carbon dioxide...

When limestone is heated, carbon dioxide is given off. This operation in metallurgy is known as:

A

Smelting

B

Reduction

C

Calcination

D

Roasting

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SHARAM PUBLICATION-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-EXERCISE
  1. The main function of roasting is :

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  2. An ore after levigation is found to have acidic impurities. Which of t...

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  3. When limestone is heated, carbon dioxide is given off. This operation ...

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  4. Delta G^@ - T plot in Ellingham 's diagram slopes are downward for the...

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  5. Which of the following pairs of metals is purified by Van Arkel metho...

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  6. Identify an alloy containing a non- metal as a constituent in it.

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  7. During electrolyte refining of copper some metals present as impurity ...

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  8. According to Ellingham diagram, the oxidation reaction of carbon to ca...

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  9. Which of the following reaction is an example of calcination process ?

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  10. What is benefaction of ore ?

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  11. Name one important ore and alloy copper.

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  12. How slag is formed in metal extraction ?

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  13. What is mean by pyrometallurgy ?

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  14. Name three alloys of Copper

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  15. The ore that can be concentrated by magnetic separation method, are .....

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  16. What is difference between mineral and ore ?

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  17. Name the deprassant which is used to separate ZnS from PbS ores in fro...

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  18. Name two collectors used in froth floatation process.

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  19. Name one acidic and one basic flux.

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  20. Why do some metals occur in the native state ?

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