The Van-Arkel method of refining Zr involves, | vedclass

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(A) The Van-Arkel method is a technique used for refining metals like $Zr$ and $Ti$. In this process,the crude metal is heated in an evacuated vessel

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removing all oxygen and nitrogen impurities

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(A) The Van-Arkel method is a technique used for refining metals like $Zr$ and $Ti$. In this process,the crude metal is heated in an evacuated vessel with iodine to form a volatile metal iodide,such as $ZrI_4$. This volatile compound is then decomposed on a tungsten filament at a high temperature $(1800 \ K)$ to obtain the pure metal. This method is specifically effective for removing all oxygen and nitrogen impurities present in the metal.

The Van-Arkel method of refining $Zr$ involves,

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