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  1. Ultra purification of a metal is done by :

  2. A.

     Slugging

    B.

     Zone melting

    C.

     Smelting

    D.

     Leaching

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    Answer : Option B

    Explanation :

    When metals are required in a ultra pure state, the zone refining method is used. The principle-employed states that the impurities, which lower the melting point of a metal remain preferentially dissolved in the liquid phase and purer metal will emerge in the solid phase.


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