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  • Water pollution in river is measured by the dissolved amo...
Multiple choice

Water pollution in river is measured by the dissolved amount of

  1. chlorine

  2. ozone

  3. nitrogen

  4. oxygen

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water pollution in rivers is standardly evaluated using Biochemical Oxygen Demand or dissolved oxygen levels, where high pollution depletes the dissolved oxygen available in the water.

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