Multiple choice

What happens to the BOD value when huge amount of sewage is dumped into the river?

  1. It increases

  2. Slightly decreases

  3. Remains the same

  4. Decreases enormously

  5. Cannot be determined
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

BOD is the amount of oxygen required by the microorganisms to decompose organic substances in sewage. If there is more organic matter in the sewage, the BOD value will increase.

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