What are the main impurities that can contaminate water? a) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining indus...
What are the main impurities that can contaminate water?
a) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess chlorine, hardness above 85 ppm.
b) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess fluoride, hardness above 85 ppm.
c) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess chlorine, hardness below 85 ppm.
a) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess chlorine, hardness above 85 ppm.
b) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess fluoride, hardness above 85 ppm.
c) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess chlorine, hardness below 85 ppm.
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Ed 
A alternativa correta é a letra A) Industrial waste, soluble and insoluble solids, oil, pesticides, metals, mining industry waste, microorganisms, excess chlorine, hardness above 85 ppm. As principais impurezas que podem contaminar a água são resíduos industriais, sólidos solúveis e insolúveis, óleo, pesticidas, metais, resíduos da indústria de mineração, microorganismos, excesso de cloro e dureza acima de 85 ppm.
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