Which parameters are used as the primary chemical metrics to determine the level of organic pollution in a water body by measuring how much dissolved oxygen is needed by microscopic organisms to break down organic material?

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A BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand)
B pH level and Turbidity
C Salinity and Conductivity
D Thermal Gradient and TDS

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Answer: A. BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand)

• Answer: A
• Explanation: BOD measures the amount of oxygen consumed by bacteria while decomposing organic matter under aerobic conditions. A high BOD or COD value indicates a high concentration of organic pollutants and low water quality, meaning less oxygen is available for aquatic life.

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Which parameters are used as the primary chemical metrics to determine the level of organic pollution in a water body by measuring how much dissolved oxygen is needed by microscopic organisms to break down organic material?

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