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  1. If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

    2. A.

    50 ppm
    B.

    100 ppm
    C.
    150 ppm
    D.

    200 ppm
    E.

    250 ppm.

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    Answer : Option D

    Explanation :

    No answer description available for this question.

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