2. Sample Papers
  3. Railways
  4. General Science & Technology
  5. Pollution of Air and Water

Railways General Science & Technology Pollution of Air and Water Sample Paper Water Pollution Sample Test Paper-21

  • question_answer
    BOD/COD ratio will always be:

    A)  Equal to 1        

    B)  Less than 1

    C)  More than 1     

    D)  none of them

    Correct Answer: B

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