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Write the role of I2 in the Arkel meth...

Write the role of
`I_2` in the Arkel method of refining.

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Zr to Ti is heated with iodine to form a volatile compound which on heating decomposes to give pure Zr or Ti.
`{:(Zr+2I_(2) to ZrI_(4)),(" (Impure) (Volatile) "),(ZrI_(4) overset(1800K)(to) Zr+2I_(2)),(" Pure "):}`.
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U-LIKE SERIES-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-LONG ANSWER QUESTIONS-I
  1. What is the role of cryolite in the extraction of aluminium?

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

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

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

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

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

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

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  8. What is 'copper matte'?

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

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

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

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

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

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

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

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

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  17. State the role of Silica in the metallurgy of copper.

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  18. State the role of Graphite rod in the electrolytic reduction of alum...

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  19. Explain the role of each of the following in the extraction of metals ...

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  20. Explain the role of each of the following in the extraction of metals ...

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