Question
Biology Question on Environmental Issues
High value of BOD (Biochemical Oxygen Demand) indicates that
A
water is less polluted
B
consumption of organic matter in the water is higher by the microbes
C
water is highly polluted
D
none of the above
Answer
water is highly polluted
Explanation
Solution
Biochemical oxygen demand or BOD is the oxygen required for microbial decomposition of a unit mass of organic remains. The degree of impurity of water due to organic matter is measured in terms of BOD. A higher BOD of a river indicates that water is highly polluted.