![Mcqmate logo](https://mcqmate.com/images/logos/logo-black.png)
![Mcqmate logo](https://mcqmate.com/images/logos/logo-white.png)
McqMate
Q. |
In which pollution zone of the river, the dissolved oxygen reduced to 0? |
A. | zone of degradation |
B. | zone of recovery |
C. | zone of clean water |
D. | zone of active decomposition |
Answer» D. zone of active decomposition |
View all MCQs in
Environmental EngineeringNo comments yet