High value of BOD (Biochemical Oxygen Demand) indicates that:
Correct answer: B. Consumption of organic matter in the water is higher by the microbes.
- A. Water is less polluted.
- B. Consumption of organic matter in the water is higher by the microbes.
- C. Water is pure.
- D. Water is highly polluted.
Explanation
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 .A high value of Biochemical Oxygen Demand (BOD) in water indicates that there is a substantial amount of organic material, such as sewage, wastewater, or other organic pollutants, present in the water. BOD is a measure of the amount of dissolved oxygen that is consumed by microorganisms while they decompose this organic material.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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