Consider the following statements:
A. BOD is oxygen consumed by micro-organisms and is an index of water pollution,
B. Drinking water should have BOD level of 1 1to 2 ppm.
Which of the following statements is are correct?
- B only
- Neither A nor B
- A only
- Both A and B
Answer: Option(4): Both A and B
Explanation
- Biological Oxygen Demand(BOD) is the amount of oxygen required by bacteria and other micro-organisms while decomposing organic matter under aerobic conditions sat specific temperature. It is an indicator of water pollution because high Biological Oxygen Demand(BOD) means low dissolved oxygen(DO) content, which can harm aquatic life. Hence statement(A) is correct.
- Drinking water should have BOD level of 1 to 2 ppm. Hence statement(B) is correct.
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