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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 amont of of oxygen consumed by microorganisms (bactoria) in decomposing organic mattr 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"` whears highly polluted water has BOD more than `17"ppm"`
Thus, water having BOD than `5 "ppm"` is rich in dissolved oxygen.
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