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What is the role of iodine in the refini...

What is the role of iodine in the refining of titanium ?

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When heated with iodine to about 500 K, titanium metal forms a volatile iodidie `(TiI_(4))` leaving behind the impurities. Upon further heating to 1200 K, `TiI_(4)` decomposes to give pure titatnium.
`Ti+2I_(2) overset(500 K) to underset("Volatile")(TiI_(4)), TiI_(4) overset(1200 K) to underset("Pure")(Ti) +2I_(2)`
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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Questions From Board Examinations
  1. Why is the extraction of copper from pyrites more difficult than that ...

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  2. State briefly the principles which serve as the basis for the followin...

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  3. What is the role of iodine in the refining of titanium ?

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  4. Describe the role of NaCN in the extraction of gold from gold ore.

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  5. What is the role of iodine in the refining of zirconium (Zr) ?

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  6. How is zinc oxide converted into metallic zinc ?

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  7. Outline the principle of the method used for refining of (a) Nickel ...

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  8. Differentiate between mineral and ore.

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  9. Describe the principle controlling the extraction of cast iron from pi...

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  10. Describe the principle behind the recovery of silver ore leached with ...

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  11. What happens when : (i)Cu(2)O undergoes self reduction in a silica l...

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  12. (a) What role does cryolite play in Hall Harnoult process ? (b) How ...

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  13. Give one example each of (i) acidic flux (ii) basic flux.

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  14. Distinguish between the following : (a) Ores and minerals (b) Flux a...

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  15. Write about Alumino thermic process with examples.

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  16. Name two important ores or iron. Write the method of extraction of iro...

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  17. Write the important ores of aluminium and the principle of extraction ...

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  18. Name a method used for removing gangue from sulphide ore.

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  19. How is wrought iron different from steel ?

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  20. Which reducing agent is employed to get copper from the low grade copp...

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