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Which of the following is true for calci...

Which of the following is true for calcination of a metal ore ?

A

It makes the ore more porous

B

The ore is heated to a temperature when fusion just begins

C

Hydrated salts lose their water of crystallisation

D

Impurities of S, As and Sb are removed in the form of their volatile oxides

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The correct Answer is:
A, C
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  1. Which of the following reaction(s) occurs during calcination?

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  2. Amphoteric nature of aluminium is employed in which of the following p...

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  3. Which of the following is true for calcination of a metal ore ?

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  4. The difference (s) between roasting and calcination is / are :

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  5. The etraction of metals from oxide ores involves

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  6. Metals which can be extracted by smelting process are :

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  7. Of the following reduction processes, correct processes are :

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  8. In the extraction of aluminium metal, one of the process is summarised...

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  9. During the production of iron and steel.

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  10. The smelting of iron in a blast furnace involves the following process...

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  11. Which one of the following metals can be extracted by aluminothermic p...

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  12. For which of the following metal, the carbon reduction cannot be used ...

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  13. The advantage(s) of using carbon to reduce a number of oxides and othe...

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  14. The disadvantage of carbon reduction method are :

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  15. Which of the following metals are extracted from its ore by using self...

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  16. Which of the following is / are correctly matched ?

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  17. The funciton of adding cryolite in the electrolytic reduction of alumi...

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  18. Which of the following reduction reactions are actually employed in co...

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  19. The chief reaction(s) occurring in blast furnace during extraction of ...

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  20. Which of the following are true for electrolytic extraction of alumini...

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