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STD 12 - 8. microbes in human welfare — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 8. microbes in human welfare1 Mark
MCQ
Which one of the following statement regarding $BOD$ is true ?
  • ✓
    The greater the $BOD$ of waste water, more is its polluting potential
  • B
    The greater the $BOD$ of waste water, less is its polluting potential
  • C
    The lesser the $BOD$ of waste water, more is its polluting potential
  • D
    The lesser the $BOD$ of waste water, less is its polluting potential
✓

Answer

Correct option: A.
The greater the $BOD$ of waste water, more is its polluting potential
a
$BOD$ is the method of determining the amount of oxygen required by microorganisms to decompose the waste present in the water supply. It is a measure of organic matter present in the water. If the quantity of organic wastes in the water supply is high then the number of decomposing bacteria present in the water will also be high. As a result, $BOD$ value will increase.

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