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Why is zone refining carried out in an inert atmosphere? |
To prevent reduction of metal To prevent oxidation of metal To reduce the external pressure To reduce the external temperature |
To prevent oxidation of metal |
When an impure metal melt is allowed to cool during zone refining, the pure metal separates out while the impurities stay in the melt. To stop the metal from oxidizing, this operation is often carried out in an inert environment. |
