Banking Chemistry Environmental Chemistry Question Bank Environmental Pollution

  • question_answer Which one of the following statement is not true?

    A)  pH of drinking water should be between 5.5-9.5

    B)  Concentration of DO below 6 ppm is good for the growth of fish.  

    C)  Clean water would have a BOD value of less than 5ppm.

    D)  Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant.

    Correct Answer: B

    Solution :

     The ideal value of D.O for growth of fishes is \[8mg/\ell \] . \[7mg/\ell \] li is desirable range, below this value fishes get susceptible to disease. A value of \[2mg/\ell \] or below is lethal for fishes.


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