Q. Consider the following statements:
1.Water pollution by organic wastes is measured in terms of Biochemical Oxygen Demand (BOD).
2.BOD is the amount of dissolved oxygen needed by bacteria in decomposing the organic wastes present in water.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: C
Notes:

Explanation: Water pollution by organic wastes is measured in terms of Biochemical Oxygen Demand (BOD).

  • BOD is the amount of dissolved oxygen needed by bacteria in decomposing the organic wastes present in water.
  • It is expressed in milligrams of oxygen per liter of water.

Source: Shankar IAS

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