Chemistry Threshold limit value of copper in the atmospheric air is 5.0 mg/m3 1.0 mg/m3 0.001 mg/m3 0.01 mg/m3 5.0 mg/m3 1.0 mg/m3 0.001 mg/m3 0.01 mg/m3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal used to recover copper from a solution of copper sulphate is Hg Fe Na Ag Hg Fe Na Ag ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? Borax Hydrogen peroxide Saltpetre Sodium chloride Borax Hydrogen peroxide Saltpetre Sodium chloride ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone consists of Oxygen only Oxygen and Carbon Oxygen and Nitrogen Hydrogen and Carbon Oxygen only Oxygen and Carbon Oxygen and Nitrogen Hydrogen and Carbon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical formula of the laughing gas is N2O N2O3 NO NO2 N2O N2O3 NO NO2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heavy metal pollution of water is caused by: Domestic sewage Paints Acid Plants Wood burning Domestic sewage Paints Acid Plants Wood burning ANSWER DOWNLOAD EXAMIANS APP
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