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When limestone is heated, CO2 is given o...

When limestone is heated, `CO_2` is given off. The metallurgical operation is

A

smelting

B

reduction

C

calcination

D

roasting.

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. The function of potassium ethyl xanthate in froth floatation process i...

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  2. Magnetic separation is used in the concentration of: Copper pyrites, C...

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  3. When limestone is heated, CO2 is given off. The metallurgical operatio...

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  4. The statement that is not correct is

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  5. Match the metal in Column I with the ores in Column II

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  6. Match the extraction process in Column I with the metal in Column II.

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  7. Match the species given in Column I that are present in the ore(s) giv...

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  8. In the extraction of chlorine from brine .

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  9. When copper ore is mixed with silica, in a reverberatory furnace coppe...

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  10. Which of the following reactions is an example of auto reduction ?

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  11. A number of elements are available in earth’s crust but most abundant ...

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  12. Zone refining is based on the principle that .

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  13. In the extraction of copper from its sulphide ore, the metal is formed...

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  14. During the electrolysis of NaCl solution, the gas liberated at the ano...

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  15. An ore of aluminium is

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  16. Electrolytic refining is used to purify which of the following metals ...

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  17. Extraction of gold and silver involves leaching the metal with CN^- io...

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  18. Answer the question on the basis of figure given below : Choose th...

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  19. Answer the question on the basis of figure given below : Below poi...

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  20. Answer the question on the basis of figure given below : For the r...

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