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  9. Q127

UPPSC PCS 2023 · Question 127 of 150

Biological Oxygen Demand (BOD) is a standard criteria for:

Geography

  1. AComputing O2 level in forest ecosystems
  2. BMeasuring O2 level in blood
  3. CAssaying O2 level in high altitude regions
  4. DPollution assay in aquatic ecosystemsCorrect

Answer: D. Pollution assay in aquatic ecosystems

Explanation

l The amount of oxygen required or needed for the biological oxidation of organic matter in water is known as biochemical oxygen demand (BOD). l The higher the BOD of a water body or sample, the more polluted it is.

Source: edurev.in solved-paper compilation (OSWAAL 15-Years UPPSC Prelims Solved Paper)

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