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  1. Which is the purest form of iron?

  2. A.

     Steel

    B.

     Cast iron

    C.

     Pig iron

    D.

     Wrought iron

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    Answer : Option D

    Explanation :

    Wrought iron is purest form of iron. It contain 99.5% iron, 0.25% carbon and 0.25% other impurities of S, P, Si etc.


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