JEE Main · ChemistryMedium
The biochemical oxygen demand () of a water sample is a measure of which of the following?
- A.The amount of dissolved oxygen required by bacteria to decompose organic matter.
- B.The total concentration of dissolved minerals in the water.
- C.The amount of oxygen produced by aquatic plants during photosynthesis.
- D.The concentration of heavy metals present in the water.
Show correct answer & step-by-step solution
Correct answer: A — The amount of dissolved oxygen required by bacteria to decompose organic matter.
Solution
- is defined as the amount of oxygen required by bacteria to break down organic matter present in a certain volume of a sample of water.
- It is a standard test to assess the pollution level of water.
- Higher values indicate higher levels of organic pollution.
- Hence the answer is (A).
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