The BOD values of water indicate the
A. Amount of organic debris
B. Amount of oxygen used for biochemical oxidation
C. Amount of oxygen used for biochemical reduction
D. Amount of ozone used for biochemical oxidation
Answer: Option B
Solution(By Examveda Team)
Clean water has BOD which is less than 5 ppm. If it is equal to or more than 12 ppm, then the water is considered as polluted. So this indicates water be rich in dissolved oxygen, that helps the microorganisms to oxidize inorganic and organic materials.This Question Belongs to General Knowledge >> Chemistry
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A water supply with a BOD level of 3-5 ppm is considered moderately clean. In water with a BOD level of 6-9 ppm, the water is considered somewhat polluted because there is usually organic matter present and bacteria are decomposing this waste.
Hence, clean water would have a BOD value of less than 5.