Question: What is B.O.D.?
Options:
A) The amount of $ O _2 $ utilized by organisms in water
B) The amount of $ O _2 $ utilized by micro-organisms for decomposition
C) The total amount of $ O _2 $ present in water
D) All of the above.
Show Answer
Answer:
Correct Answer: B
Solution:
- Strength of sewage or degree of water pollution is measured in terms of BOD (Biochemical Oxygen Demand) value. BOD may be defined as, ’number of milligrams of $ O _2 $ required for decomposition of one litre of waste or water by decomposing microorganisms (bacteria)'.
BETA
