Question:
Water sample is reported to be highly polluted if BOD (Biological Oxygen Demand) value of sample becomes:
Water sample is reported to be highly polluted if BOD (Biological Oxygen Demand) value of sample becomes:
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BOD values greater than 17 ppm indicate severe pollution in water. Use this threshold to assess water quality.
Updated On: Apr 2, 2025
- more than 17 ppm.
- equal to 10 ppm.
- equal to 5 ppm.
- less than 5 ppm.
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The Correct Option is A
Solution and Explanation
Step 1: Biological Oxygen Demand (BOD) measures the amount of oxygen required by microorganisms to decompose organic matter in water. A higher BOD value indicates a higher level of pollution.
Step 2: Water with a BOD value greater than 17 ppm is considered highly polluted. This is because the microorganisms require more oxygen to decompose the organic matter present, indicating a higher concentration of pollutants.
Step 3: Therefore, the water sample is highly polluted if the BOD value is more than 17 ppm.
Step 2: Water with a BOD value greater than 17 ppm is considered highly polluted. This is because the microorganisms require more oxygen to decompose the organic matter present, indicating a higher concentration of pollutants.
Step 3: Therefore, the water sample is highly polluted if the BOD value is more than 17 ppm.
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