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Correct statement among the following is
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a
SO4-2>50 ppm causes laxative effect
b
F-<1 ppm causes brown mottling of teeth
c
DO < 4 ppm indicates good quality water
d
Pb > 50 ppm causes kidney damage
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Correct option is D
SO4-2>500 ppm causes laxative effect.F->10 ppm causes Brittleness of bonesF-<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.Talk to our academic expert!
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