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Which methods would you recommed for the...

Which methods would you recommed for the purification of impure metals such as zinc. Copper and germanium metals ?

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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (SHORT ANSWER QUESTIONS)
  1. The choice of a reducing agent in a particular case depends upon therm...

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  2. Name three metals which are obtained by the reduction of their oxides ...

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  3. Which methods would you recommed for the purification of impure metals...

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  4. Distinguish: Slag and flux

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  5. Distinguish: Gravity and floatation process

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  6. Silver ores and native gold have to be leached with metal . cyanides. ...

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  7. Explain briefly the term poling.

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  8. What is liquation ?

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  9. Describe briefly Van Arkel method for refining of metals.

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  10. What is the principle of zone refining of metals?

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  11. Carbon monoxide is more effective reducing agent than carbon below 983...

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  12. Which metals are generally extracted by the electrolytic process ? Wha...

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  13. What are the reactions taking place at the two electrodes during elect...

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  14. How is pure alumina prepared from bauxite in Baeyer's process? Give th...

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  15. Write down the chemical formulae of the following ores: Chalcopyrites,...

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  16. Name the principal ore of aluminium.

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  17. Describe the leaching of aluminium ore.

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  18. Explain the basic principles of the following metallurgical operations...

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  19. State briefly the principles which serve as the basis for the followin...

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  20. Write the chemical reactions which take place in the following operati...

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