Which one of the following statements is not | vedclass

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(D) In environmental chemistry,Chemical Oxygen Demand $(COD)$ is the total amount of oxygen (in $ppm$) required to chemically oxidize all organic and

Vedclass · Accepted Answer

$COD$ is the measure of bacteria in water

Vedclass · Answer

(D) In environmental chemistry,Chemical Oxygen Demand $(COD)$ is the total amount of oxygen (in $ppm$) required to chemically oxidize all organic and inorganic pollutants in a given water sample. It is not a measure of bacteria.Thus,option $(D)$ is incorrect.- $NO_2$ is known to be a lung irritant.- Municipal sewage typically has a $BOD$ (Biological Oxygen Demand) value ranging from $100-4000 \ ppm$.- The primary source of $CO$ (carbon monoxide) in the atmosphere is automobile exhaust fumes.

List-$I$	List-$II$
$(1)$ Vegetable waste	$(A)$ Takes $3$ to $5$ months for natural decomposition
$(2)$ Plastic materials	$(B)$ Takes $7$ to $10$ months for natural decomposition
$(3)$ Agricultural waste	$(C)$ Remains in original form for decades without decomposition

Which one of the following statements is not correct?

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Biochemical oxygen demand $(BOD)$ value can be a measure of water pollution caused by organic matter. Which of the following statements is correct?

State the sources of dissolved oxygen in water.

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