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प्रश्न
Give the basis for the purification of metal by oxidation.
लघु उत्तरीय
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उत्तर
It is based on the fact that impurities have a higher affinity for oxygen than the metal itself. When air or an oxidizing agent is passed through the molten impure metal, the impurities oxidize to form a scum on top or escape as gases, leaving behind the pure metal.
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