

MCQOPTIONS
Saved Bookmarks
1. |
If 2% solution of a sewage sample is incubated for 5 days at 20 degrees and depletion of oxygen was found to be 5 ppm, BOD of the sewage is |
A. | 1000 ppm |
B. | 300 ppm |
C. | 250 ppm |
D. | 10 ppm |
Answer» D. 10 ppm | |