Sunday, 18 June 2017

Biological Oxygen Demand (BOD) is a standard criterion for

Question Biological Oxygen Demand (BOD) is a standard criterion for [UPSC Prelims 2017]

(a) Measuring oxygen levels in blood
(b) Computing oxygen levels in forest ecosystems
(c) Pollution assay in aquatic ecosystems
(d) Assessing oxygen levels in high altitude regions

Answer: Computing oxygen levels in forest ecosystems

Explanation: Biochemical oxygen demand is a measure of the quantity of oxygen used by microorganisms (e.g., aerobic bacteria) in the oxidation of organic matter. Natural sources of organic matter include plant decay and leaf fall.
Other Questions asked in this exam were:

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