(Answered) The concentration of fluoride lead nitrate and iron in a

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The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of : (1) Lead (2) Nitrate (3) Iron (4) Fluoride

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