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Name three metals which are obtained by ...

Name three metals which are obtained by the reduction of their oxides though they do not occur as such in earth crust.

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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (SHORT ANSWER QUESTIONS)
  1. Giving appropriate examples (at least three), explain how the reactivi...

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  2. The choice of a reducing agent in a particular case depends upon therm...

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

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

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  5. Distinguish: Slag and flux

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  6. Distinguish: Gravity and floatation process

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

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  8. Explain briefly the term poling.

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  9. What is liquation ?

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

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

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

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

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

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

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

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  17. Name the principal ore of aluminium.

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  18. Describe the leaching of aluminium ore.

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

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

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