First slide
Water pollution , major water pollutants

Correct statement among the following is


SO4-2>500 ppm causes laxative effect.

F->10 ppm causes Brittleness of bones

F-<1 ppm causes tooth decay.

Pb > 50 ppb causes Kidney damage.

NO3- > 50 ppm causes Blue baby syndrome.

DO < 4 ppm is harmful and kills micro organisms and fish.

DO > 6 ppm indicates good quality water.

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