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

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. A chemical compound is used for making rayon fabrics and in fertilizer...

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  2. Zinc sulphate is used for-

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

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  4. Write one difference between ore and mineral.

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  5. Define calcination and roasting.

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  6. Write one difference between gangue and flux.

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  7. Draw a neat and labelled diagram for the refining of aluminium by Hoop...

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  8. Write a short note on electrolytic refining of copper.

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  9. Draw a neat and labelled diagram for zone refining of metals.

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  10. Describe how the following change is brought about : Pig iron into st...

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  11. Describe how the following change is brought about : Zinc oxide into ...

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  12. Describe how the following change is brought about : Impure titanium i...

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  13. Describe the role of NaCN in the extraction of gold from gold ore.

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  14. Fill in the blanks- is the chemical compound used for making rayon fa...

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  15. Describe the role of the following in the processes mentioned: Iodine ...

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  16. What is the role of graphite rod in the metallurgy of aluminium ?

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  17. Explain the role of the following in the extraction of metals from the...

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  18. Explain the role of the following in the extraction of metals from the...

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  19. Explain the role of the following in the extraction of metals from the...

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  20. Why is the reduction of a metal oxide easier if the metal formed is in...

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