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What is the role of coke in the extracti...

What is the role of coke in the extraction of iron from its oxides?

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Coke is used as a reducing agent to obtain metal oxide. Coke at a higher temperature is also converted to CO which again acts as reducing agent.
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(i) Name the method of refining of nickel (ii) What is the role of cryolite in the extraction of aluminium ? (iii) What is the role of limestone in the extraction of iron from its oxides ?

U-LIKE SERIES-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-LONG ANSWER QUESTIONS-I
  1. Name the method of refining of metals such as Germanium.

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  2. In the extraction of Al, impure Al(2)O(3) is dissolved in conc. NaOH t...

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  3. What is the role of coke in the extraction of iron from its oxides?

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  4. Name the method of refining of nickel.

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  5. What is the role of cryolite in the extraction of aluminium?

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  6. What is the role of limestone in the extraction of iron from its oxide...

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  7. Write the role of I2 in the Arkel method of refining.

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  8. Write the role of Cryolite in the extraction of aluminium.

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  9. Write the role of Dilute NaCN in the extraction of silver.

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  10. Indicate the principle behind the method used for the refining of Nick...

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  11. What is the role of dilute NaCN in the extraction of gold?

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  12. What is 'copper matte'?

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  13. Indicate the principle behind the method used for the refining of zinc...

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  14. What is the role of silica in the extraction of copper?

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  15. Which form of the iron is the purest form of commercial iron?

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  16. Name the method of refining to obtain silicon of high purity.

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  17. What is the role of SiO(2) in the extration of copper?

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  18. What is the role of depressant in froth floatation process?

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  19. Explain the principle and working of the method of electrolytic refini...

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  20. State the role of Depressant in froth floatation process.

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