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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 the eacth's crust.

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(i) Copper (from copper pyrites, `CuFeS_(2))`
(ii) Lead (from Galena, `PbS`)
(iii) Zinc (from Zinc blende, `ZnS`).
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CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exs 1.1 (Subjective)
  1. Discuss some of the factors which need consideration before deciding o...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  17. Name the main steel plants which are operated by the Steel Authority o...

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  18. Name the metals which are associated with the following terms in their...

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  19. What do you understand by the following terms ? (a) Roasting (b) C...

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  20. Which method would you suggest for the separation of the metals in the...

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