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If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?
Civil Engineeringmedium
A50 ppm
B100 ppm
C150 ppm
200 ppm
Correct Answer: D. 200 ppm
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