Biological Oxygen Demand (BOD) is a measure of

Industrial wastes poured into water bodies.

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Extent to which water is polluted with organic compounds.

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Amount of carbon monoxide inseparably combined with haemoglobin.

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Amount of oxygen needed by green plants during night.

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Solution

The correct option is B Extent to which water is polluted with organic compounds.
Decomposition of organic matter by microbes requires oxygen. Degree of impurity of water due to organic matter is measured in terms of Biochemical oxygen demand or (BOD). BOD is the oxygen required by microorganisms to completely metabolise organic wastes present in water.

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Similar questions

The amount of O₂ required by bacteria in water to breakdown wastes into simple inorganic substances is called

Q. BOD or Biological Oxygen Demand is the level of oxygen needed in the water body for organisms to survive.

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. 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.

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