Medium
Explain the Van Arkel method with an example.
(N/A) The Van Arkel method is very useful for removing all oxygen and nitrogen present as impurities in certain metals like $Zr$ and $Ti$.
The crude metal is heated in an evacuated vessel with iodine. The metal iodide,being more covalent,volatilizes.
$Zr + 2I_2 \rightarrow ZrI_4$
The metal iodide is decomposed on a tungsten filament electrically heated to about $1800 \ K$. Thus,the pure metal is deposited on the filament.
$ZrI_4 \rightarrow Zr + 2I_2$
The crude metal is heated in an evacuated vessel with iodine. The metal iodide,being more covalent,volatilizes.
$Zr + 2I_2 \rightarrow ZrI_4$
The metal iodide is decomposed on a tungsten filament electrically heated to about $1800 \ K$. Thus,the pure metal is deposited on the filament.
$ZrI_4 \rightarrow Zr + 2I_2$
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View SolutionGiven below are two statements.
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Statement $II:$ In the process of obtaining pure copper by electrolysis method,blister copper is used to make the anode.
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Which method is not correct given for refining of crude metals?
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