Question

If BOD of water sample is very high, the sample is

• A. Highly polluted
• B. Less polluted
• C. Not polluted
• D. Potable

Hint:

BOD is directly proportional to the amount of organic matter in water. As organic matter increases, BOD increases, and Dissolved Oxygen (DO) decreases.

Answer 1

The Correct Option is A

Step 1: BOD (Biochemical Oxygen Demand) is the amount of oxygen required by bacteria to decompose the organic matter in one liter of water.
Step 2: A high BOD value indicates that there is a large amount of organic waste present, which requires more oxygen for breakdown.
Step 3: Therefore, the higher the BOD of a water sample, the greater is its polluting potential.