InterviewSolution
Saved Bookmarks
| 1. |
How much amount of dissolved oxygen does gravely polluted water consists of?(a) 20 ppm(b) 8 ppm(c) Above 4 ppm(d) Below 4 ppmThe question was asked in homework.This is a very interesting question from Environmental Issues topic in chapter Environmental Issues of Biology – Class 12 |
|
Answer» Right option is (d) Below 4 ppm |
|