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Comment on the occurrence of metals like...

Comment on the occurrence of metals like Na, Fe and Au in nature.

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Sodium (Na) does not exist in nature in the free state as it is a very reactive metal, iron (Fe) being a moderately reactive metal does not exist in nature in the free state as it is a very reactive metal, iron (Fe) being a moderately reactive metal does not exist in the free state in nature , gold (Au) is found to exist in the free state in nature becuase it is least reactive and hence called a noble metal,
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CHHAYA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE (SHORT ANSWER-TYPE QUESTIONS)
  1. What is leaching? Explain with an example.

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  2. What do you mean by concentration or beneficiation of ores?

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  3. Comment on the occurrence of metals like Na, Fe and Au in nature.

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  4. What type of ore is usually concentrated by electromagnetic separation...

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  5. Mention the methods briefly used in the beneficiation of the following...

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  6. Mention the methods briefly used in the beneficiation of the following...

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  7. Mention the methods briefly used in the beneficiation of the following...

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  8. Mention the methods briefly used in the beneficiation of the following...

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  9. What is flux? How is it chosen in metallurgy?

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  10. Is carbon a suitable reducing agent for all metal oxides? Give reason.

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  11. Differentiate between hydrometallurgy and electrometallurgy with suita...

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  12. Is it possible to extract aluminium by electrolytic reduction of Al(2)...

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  13. Is it possible to extract Al by the electrolysis of an aqueous solutio...

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  14. Copper is obtained by roasting its sulphide ore - explain.

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  15. Discuss the thermodynamic principles of metallurgy.

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  16. Explain why the following reaction, although thermodynamically feasibl...

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  17. Discuss the limitations of Ellingham diagram.

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  18. Name the precious metals in anode mud? Unlike copper, these metals do ...

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  19. The (C,CO) line on the Ellingham diagram slopes downwards. Give reason...

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  20. The (Co, CO(2)) line on the Ellingham diagram slopes upwards. Give rea...

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