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SSC Sample Paper SSC (Group-C) Sample Test Paper-9

  • question_answer
    The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample water, is called:

    A)  BOD

    B)  COD

    C)  BOD and COD both

    D)  None of these

    Correct Answer: A

    Solution :

     Biochemical oxygen demand or B.O.D is the amount of dissolved oxygen needed by aerobic bio-logical organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. It is widely used as an indication of the organic quality of water.


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