Q. In which one of the following, the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
A) SE < S < PE < DE
B) SE < PE < S < DE
C) PE < S < SE < DE
D) S < DE < PE < SE
Explanation
The ascending order of BOD is Sewage (S) < Distillary Effluent (DE) < Paper Mill Effluent (PE) < Sugar Mill Effluent (SE).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.