High biological oxygen demand indicates __________.

Environmental Science
Aroma Ann0

A. absence of microbial pollution
B. moderate microbial pollution
C. intense level of microbial pollution
D. all of these

BOD indicates the amount of putrescible organic matter present in water. Therefore, a low BOD is an indicator of good quality water, while a high BOD indicates polluted water. Dissolved oxygen (DO) is consumed by bacteria when large amounts of organic matter from sewage or other discharges are present in the water.

Related Mcqs:

  1. A high Biological Oxygen Demand (BOD) indicates that ___________.
  2. BOD of a river water is found very high. This means water __________?
  3. A river with high BOD value is __________?
  4. Biological Oxygen Demand (BOD) is a measure of:?
  5. The presence of high coliform counts in water indicates __________?
  6. BOD stands for __________?
  7. If with minimum quantity of potassium permanganate, the pink colour of water disappears soon, then it shows that
  8. Humus is:?
  9. Oil spills are a source of pollution for __________.
  10. In case the concentration of oxygen in the tissues were almost as high as at the respiratory surface then:

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