Q. The expansion of BOD is

A
Biological Oxygen Demand
B
Biosynthetic Oxygen Demand
C
Biochemical Oxygen Destroyer
D
Biochemical Oxygen Dimension
Solution:

Biochemical Oxygen Demand (BOD, also called Biological Oxygen Demand) is the amount of dissolved oxygen needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.

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