Is it true that, if the dissolved oxygen level drops to zero,

cbse-class-12

#1

Is it true that, if the dissolved oxygen level drops to zero, the water will become septic? Give an example which could lower the dissolved oxygen content of an aquatic body.


#2

Yes, it is true. In case of zero level of Dissolved Oxygen - (DO), the water becomes septic. Organic pollutants like fertiliser in aquatic bodies are responsible for lowering (upto zero) the level of dissolved oxygen.