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प्रश्न
Describe the role of the following in the process mentioned.
Iodine in the refining of Zirconium.
उत्तर
Zirconium crude metal is heated with iodine in an evacuated vapour to separate from impurities and this decomposes at 1800 K to give a pure zirconium metal and iodine. Initially, iodine is heated with zirconium to form a volatile compound.
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\[\ce{Zr (impure) + 2I2 ->[523 K] ZrI4}\]
\[\ce{ZrI4 ->[1800 K] Zr (pure) + 2I2}\]
This method is known as
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