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Microbes In Human Welfare

Question
CBSEENBI12047188
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Increase of BOD in water leads to

  • increase in the dissolved O2 concentration

  • decrease in the dissolved O2 concentration

  • maintenance of dissolved O2 concentration at the same level

  • no effect on dissolved O2 concentration

Solution

B.

decrease in the dissolved O2 concentration

Biochemical Oxygen Demand (BOD) is the oxygen in milligrams required-for five days in one litre of water at 20°C for the micro-organisms to metabolise organic waste. Increase of BOD in water leads to decrease in the dissolved oxygen concentration.

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