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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 ?

Text Solution

Verified by Experts

Zinc : The metal may be purified by
(i) Fractional distillation
(ii) Electrolytic refining
Copper : The metal may be purified by
(i) Poling
(ii) Electrolytic refining
Germanium : The metal may be purified by zone refining.
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CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exs 1.1 (Subjective)
  1. Copper and silver lie below hydrogen in electrochemical series and yet...

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  2. Describe the principle of froth flotation process. What is the role of...

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

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  4. Name the chief forms of the occurrence of the following in the earth's...

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  5. Discuss some of the factors which need consideration before deciding o...

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

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  7. Which is a better reducing agent at 710^@ C : C or CO ?

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  8. Indicate the temperature at which carbon can be used as a reducing age...

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  9. Is it true that under certain conditions, Mg can reduce SiO(2), and S...

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

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  11. name three metals which are obtained by the reduction of their oxides ...

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  12. Outline the principles of refining of metals by the following methods ...

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  13. Predict the modes of occurrence of the following three types of metals...

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  14. How do non-metals occur in nature ? How are they extracted//isolated f...

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  15. Name the chief ores of tin, iron and aluminium. What methods are emplo...

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  16. Name three ores which are concentrated by froth flotation process. Wha...

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  17. What is the thermodynamic consideration in the choice of a reducing ag...

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

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  19. Describe the principle of extraction of each of the following : (a) ...

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  20. Which metals are generally extracted by the electrolytic processes ? W...

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