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  1. Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.

    2. A.
    0.5 to 1
    B.
    10 to 15
    C.
    300 to 500
    D.
    1000 to 1500

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    Workspace

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    Answer : Option A

    Explanation :

    No answer description available for this question.

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