{"id":91484,"date":"2025-06-01T10:57:35","date_gmt":"2025-06-01T10:57:35","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91484"},"modified":"2025-06-01T10:57:35","modified_gmt":"2025-06-01T10:57:35","slug":"biological-oxygen-demand-bod-is-a-standard-criterion-for","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/biological-oxygen-demand-bod-is-a-standard-criterion-for\/","title":{"rendered":"Biological Oxygen Demand (BOD) is a standard criterion for"},"content":{"rendered":"

Biological Oxygen Demand (BOD) is a standard criterion for<\/p>\n

[amp_mcq option1=”Measuring oxygen levels in blood” option2=”Computing oxygen levels in forest ecosystems” option3=”Pollution assay in aquatic ecosystems” option4=”Assessing oxygen levels in high altitude regions” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC IAS – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is C) Pollution assay in aquatic ecosystems.
\n<\/section>\n
\nBiological Oxygen Demand (BOD) is a measure used to indicate the amount of dissolved oxygen consumed by microorganisms in a water sample while they decompose organic matter under aerobic conditions. It is a standard test for assessing the level of organic pollution in water bodies.
\n<\/section>\n
\nHigh BOD values indicate that there is a large amount of biodegradable organic material in the water, which consumes a significant amount of dissolved oxygen as it decomposes. This depletion of oxygen can harm aquatic life. Therefore, BOD is a crucial parameter in evaluating the quality of water and the extent of pollution in rivers, lakes, and other aquatic ecosystems. Options A, B, and D relate to oxygen levels in blood, forests, or high altitudes, which are not measured by BOD.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Biological Oxygen Demand (BOD) is a standard criterion for [amp_mcq option1=”Measuring oxygen levels in blood” option2=”Computing oxygen levels in forest ecosystems” option3=”Pollution assay in aquatic ecosystems” option4=”Assessing oxygen levels in high altitude regions” correct=”option3″] This question was previously asked in UPSC IAS – 2017 Download PDFAttempt Online The correct answer is C) Pollution assay in … <\/p>\n

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