High value of BOD (Biochemical Oxygen Demand) indicates
Water is less polluted
Water is pure
Consumption of organic matter in the water is higher by the microbes
None of these
A
Consumption of organic matter in the water is higher by the microbes
B
Water is less polluted
C
None of these
D
Water is pure
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Solution
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Biochemical Oxygen Demand or Biological Oxygen Demand is a measurement of the amount of dissolved oxygen (DO) that is used by aerobic microorganisms while decomposing organic matter in water. A high BOD indicates two things: -
1. There is a high level of microorganisms in the water, and
2. There is a high content of organic material in the water that is broken down by the organisms. This is an indication of organic pollution.
Thus, the correct answer is (B).
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