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प्रश्न
Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted.
Reason(R): High biological oxygen demand means high activity of bacteria in water.
विकल्प
Both (A) and R are correct and (R) is the correct explanation of (A)
Both (A) and R are correct and (R) is not the correct explanation of (A)
Both (A) and (R) are not correct
(A) is correct but (R) is not correct
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उत्तर
(A) is correct but (R) is not correct
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संबंधित प्रश्न
Bhopal Gas Tragedy is a case of ________.
Haemoglobin of the blood forms carboxy haemoglobin with ______.
The pH of normal rain water is ______.
Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using ______.
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be ______.
What would happen, if the greenhouse gases were totally missing in the earth’s atmosphere?
Ethane bums completely in air to give CO2. while in a limited supply of air gives CO. The same gases are found in automobile exhaust. Both CO and CO2 are atmospheric pollutants
- What is the danger associated with these gases?
- How do the pollutants affect the human body?
How is acid rain formed?
Differentiate the following:
BOD and COD
Differentiate the following:
Viable and non-viable particulate pollutants
