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How can ZnS be separated from a mixture ...

How can ZnS be separated from a mixture of PbS and ZnS?

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CHHAYA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE (SHORT ANSWER-TYPE QUESTIONS)
  1. Discuss the thermodynamic principles of metallurgy.

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

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  3. Discuss the limitations of Ellingham diagram.

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

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

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

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  7. Write the reactions taking place in different zones in the blast furna...

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  8. In metallurgy, the sulphide ore of copper is partly roasted. Why?

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  9. How can ZnS be separated from a mixture of PbS and ZnS?

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  10. Mention an important use of the thermite process.

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  11. What is the difference between carbon reduction and electrolytic reduc...

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  12. Aluminium reduces Cr(2)O(3) to Cr, but chromium cannot reduce Al(2)O(3...

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  13. What is vapour phase refining ? Explain with an example.

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  14. Give an example of extraction of a metal both by oxidation and reducti...

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  15. CO is a more effective reducing agent than C (coke) below 983K, but C ...

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  16. Althrough Cu and Ag are placed below hydrogen in the electrochemical s...

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  17. Name the metals that are usually extracted by electrolytic reduction. ...

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  18. Though H(2) is a good reducing agent, why is it not used as a reductan...

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  19. Why is the temperature during carbon-reduction of ZnO maintained at 14...

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  20. Cinnabar (HgS) and galena (PbS) are converted into their respective me...

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