Q. What does $BOD_{5}$ represent?
A) Biological ozone depletion in five days
B) Dissolved oxygen left after five days
C) Dissolved oxygen consumed in five days
D) Micro-organisms killed by ozone in sewage treatment plants in five hours
Explanation
(c)
$BOD_{5}$ means, dissolved oxygen consumed in five days
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.