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Name the methods used for the concentrat...

Name the methods used for the concentration of ores.

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Name one chief ore each of copper and aluminium. Name the method used for the concentration of these two ores.

Name the process used for the concentration of zinc blende.

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Name the method used for extraction of alkali metals

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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (SHORT ANSWER QUESTIONS)
  1. How do elements generally occur?

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  2. What is meant by minerals and ores ? Are all minerals ores?

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  3. Name the methods used for the concentration of ores.

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  4. What is calcination and roasting ?

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  5. Giving appropriate examples (at least three), explain how the reactivi...

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

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

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

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  9. Distinguish: Slag and flux

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  10. Distinguish: Gravity and floatation process

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

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  12. Explain briefly the term poling.

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  13. What is liquation ?

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

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

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

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

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

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

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

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