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Why is Fe an abundant element on earth, ...

Why is `Fe` an abundant element on earth, and why are the elements with higher atomic number increasingly rare ?

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CENGAGE CHEMISTRY ENGLISH-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exs 1.1 (Subjective)
  1. Why is Fe an abundant element on earth, and why are the elements with ...

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  2. Copper and silver lie below hydrogen in electrochemical series and yet...

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

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

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

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

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

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

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

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

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

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  12. Alkali metals cannot be extracted by reduction of their oxides and oth...

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  13. Outline the principles of refining of metals by the following methods:...

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

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

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

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

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

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

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

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