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MHT CET202015 Oct 2020Evening ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

Which following method is used for refining of impure zirconium?

Options

  1. ALiquation
  2. BZone refining
  3. CPolling
  4. DVan Arkel method

Correct answer

D. Van Arkel method

Step-by-step solution

Van Arkel method is used for refining Zr and Ti . Van Arkel process involves heating the impure metal with Iodine. It forms a volatile complex which on decomposition at high temperatures, gives back the metal but in very pure form. Refining of Zr and Ti using Van Arkel method For Zirconium, Zr (impure) +2 l ₂ Zrl ₄ Zrl ₄ Zr (pure) +2 I ₂ (at 1800K) For Titanium, Ti(impure) +2 I ₂ Til ₄ Til ₄ Ti ( pure )+2 I ₂( at 1800 ~K )

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