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  • BOD is : Option: 1 The amount of oxygen required to convert the NO in to NO2 in a certain volume of a sample of water  &nbs

BOD is : 

Option: 1

The amount of oxygen required to convert the NO in to NO2 in a certain volume of a sample of water      


Option: 2

The amount of F– ions required to convert, one mole of hydroxyapatite into fluorapatite.


Option: 3

The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water.


Option: 4

The amount of oxygen required to break down the non-biodegradable waste.


Answers (1)

best_answer

 

Biochemical oxygen demand (BOD) -

The amount of oxygen required for five days in one litre of water at 200 C for the microorganisms to metabolite organic waste.

- wherein

Clear water has BOD less than 5 ppm , highly polluted water has BOD of 17 ppm or more.

 

BOD- Biochemical Oxygen Demand is supposed to measure the amount of food (or organic carbons) that bacteria can oxidize. In other words, BOD is a measure of the amount of oxygen required to remove waste organic matter from water in the process of decomposition by aerobic bacteria.

Therefore, Option(3) is correct.

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