Biochemical oxygen demand (BOD) in a riv...

Biochemical oxygen demand (BOD) in a river water

A

Remains unchanged when algal bloom occurs

B

Increases when sewage gets mixed up with river water

C

Has no relationship with concentration of oxygen in water

D

Gives a measure of Salmonella in water

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The correct Answer is:

B

Biochemical oxygen demand (BOD) in a river water increases when sewage gets mixed up with river water.

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