1.

Biochemical oxygen demand (BOD) in a river waterA. Remains unchanged when algal bloom occursB. Increases when sewage gets mixed up with river waterC. Has no relationship with concentration of oxygen in waterD. Gives a measure of Salmonella in water

Answer» Correct Answer - B
Biochemical oxygen demand (BOD) in a river water increases when sewage gets mixed up with river water.


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