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Question:

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

Consumption of organic matter in the water is higher by the microbes

Water is pure

None of these

Water is less polluted

Solution:

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 (A).