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How is water pollution in rivers measured? — UPSC Prelims PYQ 1998

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The water pollution in river is measured by the dissolved amount of

  1. Chlorine
  2. Ozone
  3. Nitrogen
  4. Oxygen

Explanation

Option (d) is correct
  • Water pollution in rivers is commonly measured in terms of Dissolved Oxygen (DO). Dissolved oxygen Answer: (d) Oxygen
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