Ques. Biochemical oxygen demand (BOD) in a river water
A. has no relationship with concentration of oxygen in the water
B. gives a measure of Salmonella in the water
C. increases when sewage gets mixed with river water
D. remains unchanged when algal bloom occurs.
Answer:C
Ques. Biochemical oxygen demand (BOD) in a river water
A. has no relationship with concentration of oxygen in the water B. gives a measure of Salmonella in the water C. increases when sewage gets mixed with river water D. remains unchanged when algal bloom occurs.