2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    When huge amount of sewage is dumped into a river, its B.O.D. will

    A) increase

    B)        decrease

    C) sharply decrease

    D)         remain unchanged

    Correct Answer: A

    Solution :

    [a] By dumping of huge amount of sewage, the oxygen levels are depleted, which are reflected in terms of BOD values of water. The number of microbes also increases tremendously and these also consume most of the oxygen. Thus BOD of the river water will increase.


You need to login to perform this action.
You will be redirected in 3 sec spinner