is the amount of dissolved oxygen needed by organisms present in water bodies to digest the organic nutrients present in it.

COD

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LOD

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BOD

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MOD

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Solution

The correct option is C BOD
Biological Oxygen Demand or Biochemical Oxygen Demand is the amount of dissolved oxygen needed by organisms present in water bodies to digest the organic nutrients present in it. When the amount of organic nutrients in water increases, the microorganisms that break them down also increase. This increases the BOD and thus lesser oxygen is available for other organisms to breathe.

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Similar questions

Q32 Consider the following statements,

i) The chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water.

ii) Biochemical oxygen demand is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.

Which of the above statements is/are correct?

Q. The amount of oxygen required to oxidise organic substances present in water is called:

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.

Biochemical oxygen demand is a measure of organic material present in water. BOD value less than 5ppm indicates a water sample to be ___________.

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