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    Question

    Biological Oxygen Demand (BOD) is a measure

    of:
    A Industrial wastes poured into water bodies Correct Answer Incorrect Answer
    B Extent to which water is polluted with organic compounds Correct Answer Incorrect Answer
    C Amount of carbon monoxide inseparably combined with hemoglobin Correct Answer Incorrect Answer
    D Amount of oxygen needed by green plants during night Correct Answer Incorrect Answer

    Solution

    BOD finds its primary importance in sewage treatment plants.  It gives the respiration rate of sewage, sludge, soil, and garbage . It determines the rate of respiration in living beings. Measuring BOD gives the COD or Chemical Oxygen Demand of inorganic substances.

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