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Which is the cheapest and most abundant ...

Which is the cheapest and most abundant reducing agent which is used in the extraction of metals ?

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Carbon in the form of coke.
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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Conceptual Questions
  1. Name the metal used as a reducing agent in aluminothermie process.

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  2. What is basic difference between calcination and roasting?

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  3. Which is the cheapest and most abundant reducing agent which is used i...

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  4. Why does CaO react with SiO2 to form a slag?

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  5. Why is the formation of sulphate in calcination sometimes advantageous...

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  6. Why Al cannot be reduced by carbon?

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  7. How does NaCN act as a depressant in preventing ZnS from forming the f...

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  8. Which is better reducing agent at 983 K, 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. Which metals are generally extracted by the electrolytic processes ? W...

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  11. What is the composition of 'Copper matte'?

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  12. What is cupellation ?

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  13. What type of ores are roasted?

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  14. Granulated zinc is obtained by

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  15. What is Kroll process ?

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  16. The iron obtained from the blast furnace is called:

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

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  18. Name three forms of iron. How do these three forms differ?

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  19. Reducing agent of haematite in blast- furnace is

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  20. (a) What is a slag ? (b) Give the principle of zone refining ? ( c...

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