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(D) The given reaction represents the Van Arkel method for the refining of metals like $Ti$ and $Zr$.In this process,the crude metal is heated in an e

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Van Arkel

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(D) The given reaction represents the Van Arkel method for the refining of metals like $Ti$ and $Zr$.In this process,the crude metal is heated in an evacuated vessel with iodine to form a volatile metal iodide $(TiI_4)$.The metal iodide is then decomposed by heating it over a tungsten filament at a higher temperature $(1700 \ K)$ to obtain the pure metal.This method is specifically used to remove oxygen and nitrogen impurities from metals.

Column $I$ (Refining methods)	Column $II$ (Metals)
$(I)$ Liquation	$(a)$ $Zr$
$(II)$ Zone refining	$(b)$ $Ni$
$(III)$ Mond process	$(c)$ $Sn$
$(IV)$ Van Arkel Method	$(d)$ $Ga$

Which method of purification is represented by the following equation?
$Ti_{(s)} + 2I_{2(g)}$ $\xrightarrow{523 \ K} TiI_{4(g)}$ $\xrightarrow{1700 \ K} Ti_{(s)} + 2I_{2(g)}$

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Column $I$ (Refining methods) Column $II$ (Metals)

$(I)$ Liquation $(a)$ $Zr$

$(II)$ Zone refining $(b)$ $Ni$

$(III)$ Mond process $(c)$ $Sn$

$(IV)$ Van Arkel Method $(d)$ $Ga$

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Which method of purification is represented by the following equation?$Ti_{(s)} + 2I_{2(g)}$ $\xrightarrow{523 \ K} TiI_{4(g)}$ $\xrightarrow{1700 \ K} Ti_{(s)} + 2I_{2(g)}$