Water samples with BOD values of 4 ppm and 18 ppm, respectively, are :

  • Option 1)

    Clean and Highly polluted

  • Option 2)

    Highly polluted and Highly polluted 

  • Option 3)

    Clean and Clean 

  • Option 4)

    Highly polluted and Clean

Answers (2)
A admin

 

Biochemical oxygen demand (BOD) -

The amount of oxygen required for five days in one litre of water at 200 C for the microorganisms to metabolite organic waste.

- wherein

Clear water has BOD less than 5 ppm , highly polluted water has BOD of 17 ppm or more.

As we have learned in BOD that clear water would have BOD value of less than 5ppm where as highly polluted water could have  is BOD value of 15ppm or max

 


Option 1)

Clean and Highly polluted

Option 2)

Highly polluted and Highly polluted 

Option 3)

Clean and Clean 

Option 4)

Highly polluted and Clean

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