Chemistry Main source of lead pollution is from Sewage Insecticides Tobacco Leaded gasoline Sewage Insecticides Tobacco Leaded gasoline ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is used for dating very old objects of archaeological importance? Tritium Phosphorus-31 Radium Carbon-14 Tritium Phosphorus-31 Radium Carbon-14 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Helium gas is used in gas balloons instead of hydrogen gas because it is More stable Non-combustible More abundant than hydrogen Lighter than hydrogen More stable Non-combustible More abundant than hydrogen Lighter than hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry The Refrigerant 'FREON' is Hydrofluosilicic Acid Fluorspar and Felspar Calcium Tetra Fluoride Difluoro Dichloro Methane Hydrofluosilicic Acid Fluorspar and Felspar Calcium Tetra Fluoride Difluoro Dichloro Methane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which metal does not undergo corrosion due to the formation of oxide layer? Copper Zinc Aluminium Iron Copper Zinc Aluminium Iron ANSWER DOWNLOAD EXAMIANS APP
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