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What type of ores are roasted?...

What type of ores are roasted?

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Sulphide ores are roasted to convert them into their corresponding oxides since oxides are more easily reduced to metals than sulphides.
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PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -ADDITIONAL QUESTIONS (Very Short Answer Questions)
  1. In the extraction of Al, impure alumina is dissolved in conc....

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  2. What is slag ? Give one example.

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  3. What type of ores are roasted?

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  4. What is meant by the term 'pyrometallurgy' ?

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  5. Indicate the temperature at which carbon can be used as a reducing age...

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  6. What is the role of coke in the extraction of iron from its ...

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  7. Name the reducing agent to obtain iron from Fe2 O 3 at hi...

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  8. Write a non - exothermic reaction takind place in the blast fur...

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  9. Which form of the iron is the purest form of commercial iron ?

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  10. What is the role of silica in the extraction of copper?

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  11. What is the composition of 'Copper matte'?

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  12. How is copper extracted from low grade copper ores?

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  13. Which reducing agent is employed to get copper from the leached low-gr...

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  14. Write the overall reaction taking place in the process used for ...

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  15. How are tin and lead purified ?

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  16. Mention two important substances present in the 'anode mud' obtaine...

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  17. What is the principle of zone refining ?

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  18. Give an example of zone refining of metals.

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  19. Write the anem of the method used for refining of the followi...

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  20. Write the principle of the method used for refining of germa...

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