Chemistry What is the element that is in the highest percentage in the composition of the earth ? Iron Silicon Oxygen Magnesium Iron Silicon Oxygen Magnesium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a gaseous air pollutant? Oxides of nitrogen Oxides of sulphur Hydrocarbon Smoke Oxides of nitrogen Oxides of sulphur Hydrocarbon Smoke ANSWER DOWNLOAD EXAMIANS APP
Chemistry If lime water is kept in the air, it turns milky due to presence of : Sulphurdioxide Carbondioxide Nitrogen Oxygen Sulphurdioxide Carbondioxide Nitrogen Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following metals is not a pollutant ? Aluminium Mercury Lead Arsenic Aluminium Mercury Lead Arsenic ANSWER DOWNLOAD EXAMIANS APP
Chemistry The deterioration of a metal by an electrochemical process is commonly termed as Corrosion Erosion Passivation Abrasion Corrosion Erosion Passivation Abrasion ANSWER DOWNLOAD EXAMIANS APP
Chemistry Iron and manganese present as pollutants in water cannot be removed by________ Oxidation followed by settling and filtration Ion exchange process Lime soda process or manganese zeolite process Chlorination Oxidation followed by settling and filtration Ion exchange process Lime soda process or manganese zeolite process Chlorination ANSWER DOWNLOAD EXAMIANS APP
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