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प्रश्न
What is the importance of measuring BOD of a water body?
उत्तर
The amount of BOD of water is the amount of organic material present in water in terms of how much oxygen will be required to break it down biologically. Clean water has a BOD value less than 5 ppm. While highly polluted water has a BOD value of 17 ppm or more.
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संबंधित प्रश्न
Identify the wrong statement in the following.
What is degradable pollutants?
Which one of the following river is highly polluted?
Which one of the following is the cause of acid rain?
What is the difference between pollution and pollutants?
What are the effects of air pollution on human health?
In which town, do vehicles emit the most carbon monoxide?
Why does water covered with excessive algal growth become polluted?
Assertion (A): If BOD level of water in a reservoir is less than 5 ppm it is highly polluted.
Reason (R): High biological oxygen demand means low activity of bacteria in water.
Which of the following is not a cause of air pollution?
