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Roasting is a process in which ores are ...

Roasting is a process in which ores are heated in the __________.

A

absence of air

B

excess supply of air

C

limited supply of air

D

presence of carbon

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The correct Answer is:
B
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Roasting is a process in which the ore (mostly sulphide) is heated strongly in the presence of excess of air. The heating should be done at a temperature below the melting point of the ore. Select of correct statement :

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Roasting is a process in which the ore (mostly sulphide) is heated strongly in the presence of excess of air. The heating should be done at a temperature below the melting point of the ore. 2PbS + 3O_(2) rarr A + 2SO_(2) The name of A is.

Roasting process is used for:

Roasting of ores is done in

Calcination is the process of heating the ore strongly in the _____of air.

What is the process in which concentrated ore is reduced to the corresponding metal by heating at high temperature with reducing agent ?

TARGET PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Critical Thinking
  1. Froth floatation process for the concentration of ores is an illustrat...

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  2. Which of the following metals is obtained by leaching out process usin...

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  3. Roasting is a process in which ores are heated in the .

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  4. The role of calcination in metallurgical operation is

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  5. Which one of the following reactions is an example for calcination pro...

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  6. The process of calcination is generally carried out in case of .

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  7. Which of the following reactions involves the smelting process ?

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  8. In metallurgy , flux is a substance used to convert.

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  9. Which of the following is NOT an alkaline flux ?

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  10. Specific gravity of slag is

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  11. For the formation of carbon dioxide , Delta G^(@).

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  12. For the temperature at which C to CO line lie below the metal oxide li...

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  13. A newly discovered metal 'M' was found to have it graph of formation o...

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  14. Which of the following statements is INCORRECT on the basis of Ellingh...

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  15. Liquation process for refining of crude metal is used when .

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  16. During the process of polling , .

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  17. The fact that impurities are more soluble in the molten state than in ...

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  18. Inert atmosphere of argon is used during ozone refining to prevent.

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  19. Gallium arsenide is purified by .

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  20. Which of the following impurities are removed in van Arkel method ?

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