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Teaching Environmental Studies Water Question Bank Questions - Water

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    What is \[BO{{D}_{5}}\]? (PTET Feb 2011)

    A) Biochemical Oxygen Demand in 5 hours

    B) BF -Tical Oxygen Demand in 5 days

    C) Blochemical Oxygen Demand in 5 months

    D) Biochemical Oxygen Demand in 5 minutes

    Correct Answer: B

    Solution :

    [b] \[BO{{D}_{5}}\]value is most commonly expressed in miligrams of \[{{O}_{2}}\] consumed per litre of sample during 5 days of incubation at \[20{}^\circ C\].


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