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Discussion :: UPSC Civil Service Exam Questions

  1. In water treatment process, the chemical used for defluoridation is

  2. A.
    Alum
    B.
    Lime
    C.
    Potassium permanganate
    D.
    Sodium aluminate

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    Answer : Option A

    Explanation :

    No answer description available for this question. Let us discuss.


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