Q151
BOD of a river water is found very high. This means water
A.
is clear
B.
is highly polluted
AnswerC.
contain Algae
D.
contain many dissolved minerals
Answer: Option B
Solution
Answer: Option B
Solution:
BOD (Biological Oxygen Demand or Biochemical Oxygen Demand) is the amount of dissolved oxygen, expressed in milligrams of oxygen per litre of water, consumed by micro-organisms to decompose the organic matter present in water.