First slide

Water Pollution and its Control

Question

Statement A : Water pollutants are measured by BOD.
Statement B : If BOD is more, the water is polluted.

Easy

A

Both statement A and statement B are correct
B

Both statement A and statement B are incorrect
C

Statement A is correct but statement B is incorrect
D

Statement B is correct but statement A is incorrect

Solution

Water pollutants are commonly measured by their main common denominator, called BOD (Biochemical Oxygen Demand), i.e., the amount of free oxygen absorbed by extraneous substances from water. If water is polluted, it will consume more oxygen, thereby enhancing the BOD of water.

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