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Question: Answered & Verified by Expert
BOD refers to:
BiologyMicrobes in Human WelfareNEET
Options:
  • A The amount of the oxygen that would be consumed to oxidize all the inorganic matter in one liter of water
  • B The amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria.
  • C The amount of the oxygen that would be consumed if all the organic and inorganic matter in one liter of water were oxidised by bacteria.
  • D The amount of the oxygen that would be produced if all the organic matter in one liter of water were oxidised by bacteria.
Solution:
2075 Upvotes Verified Answer
The correct answer is: The amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria.
The measure of oxygen used by microorganisms to decompose the waste is called biological oxygen demand. To decompose waste a large number of bacteria are present and for that demand for oxygen will be high. So the BOD will be high. It will decrease when waste is completely consumed. So the correct answer will be C.

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