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What is the role of cryolite in the meta...

What is the role of cryolite in the metallurgy of aluminium?

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Answer the Following: (i) What si the role of cryolite in the metallurgy of aluminium? (ii) Differentiate between roasting and calcination. (iii) What is meant by the term 'chromatography'? OR Write the reaction taking place in different zones of the blast furnace to obtain Iron.

(i) What is the role of cryolite in the extraction of aluminium ? (ii) What is the role of limestone in the extraction of iron from its oxides ?

(i) Name the method of refining of nickel (ii) What is the role of cryolite in the extraction of aluminium ? (iii) What is the role of limestone in the extraction of iron from its oxides ?

Describe the following : - (i) The role of cryolite in electro metallurgy of aluminium. (ii) The role of carbon monoxide in the refining of crude nickel.

Describe the following: (i) Role of depressant in forth floatation process. (ii) Role of silica in the metallurgy of copper. (iii) Role of cryolite in the metallurgy of aluminium.

What is the role of graphite in the electrometallurgy of aluminium ?

PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -IMPORTANT QUESTIONS FOR BOARD EXAMINATION
  1. What is the significance of leaching in the extraction of aluminium?

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  2. Why is it advantageous to roast a sulphide ore to the oxide before red...

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  3. Giving examples differentiate between roasting and calcination.

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  4. Suggest a condition unders which magnesium could reduce alumina.

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  5. How is cas iron different from pig iron ?

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  6. The choice of a reducing agent in a particular case depends on thermod...

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  7. The extraction of Au by leaching with NaCN both oxidation and reductio...

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  8. (a) During roasting most of the metals are converted into their ...

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  9. What is the principle of thermite process ? Name two meals which can ...

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

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  11. Write down the reactions taking place in Blast furnace related t...

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  12. What is a slag ? Give one example.

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  13. How is copper extracted from a low grade ore of it ?

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  14. Which of the following metals cannot be extracted by the smelt...

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  15. What is the role of cryolite in the metallurgy of aluminium?

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  16. Both iron and aluminium combine slowly with oxygen at room temperature...

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  17. Why is an external emf of more than 2.2V required for the extraction o...

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  18. Suggest one method for separation of nickel form cobalt ?

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  19. Discuss the chemistry of the following reagents in the refini...

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  20. Write the composition, one property and one use of each of the...

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