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Manure/Fertilizers

is a measure ...

Question

is a measure of amount of dissolved oxygen required for decomposition of waste organic matter from water

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Solution

Biological Oxygen Demand is defined as the amount of dissolved oxygen required by aerobic microorganisms to breakdown the organic materials in a sample of water at a specific temperature & time frame.

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mL of water required

1.47

K_{2} C r_{2} O_{7}

= 294

) for oxidation of dissolved organic matter. C.O.D (Chemical Oxygen Demand) of water is?

Q. Read the following statements (A-D) related to Biochemical Oxygen Demand (BOD) and identify the correct option stating true (T) and false (F).

A. Biochemical oxygen demand is defined as the amount of dissolved oxygen needed by microorganisms in decomposing the inorganic wastes.
B. Greater the BOD of waste water, the higher is the amount of organic matter present.
C. The BOD increases with time as organic matter gets decomposed.
D. Sewage water is treated till the BOD is reduced

Q. Assertion :Amount of biodegradable organic matter present in water is measured by BOD of water. Reason: During biodegradation of organic compounds, oxygen is released.

Q. Assertion :Amount of biodegradable present in water is measured by BOD organic matter. Reason: During biodegradation of organic compounds, oxygen is released.

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

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