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Biochemical Oxygen Deman, (BOD) is a mea...

Biochemical Oxygen Deman, (BOD) is a measure of organic material present in water. BOD value less than `5 "ppm"` indicates a water sample to be

A

Rich in dissolved oxygen

B

Poor in dissolved oxygen

C

Highly polluted

D

Not suitable for aquatic life

Text Solution

Verified by Experts

The correct Answer is:
A
The total amount of oxygen consumed by microorganisms (bacteria) in decomposing organic matter present in certain volume of a sample of water is called Biochemical Oxygen Demand (BOD) of the water.
Water considered to be pure if it has BOD less than 5 ppm whereas highly polluted water has BOD more than 17 ppm.
Thus, water having BOD less than 5 ppm is rich in dissolved oxygen.
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