Question

If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D of the sewage is:

• A. 200 ppm
• B. 250 ppm
• C. 225 ppm
• D. None of these

Answer 1

Answer:

B. 250 ppm