In van Arkel method, if \( \mathrm{I}_{2} \) is introduced at \( 1700 \mathrm{~K} \) over impure...

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In van Arkel method, if \( \mathrm{I}_{2} \) is introduced at \( 1700 \mathrm{~K} \) over impure metal, the product will be :
(a) iodide of the metal
(b) no reaction takes place
(c) impurities react with iodine
(d) none of these
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