Chemistry The gas that usually causes explosions in coal mines is Methane Carbon monoxide Hydrogen Air Methane Carbon monoxide Hydrogen Air ANSWER DOWNLOAD EXAMIANS APP
Chemistry The addition of gypsum to portland cement helps in : Reduction in the cost of cement Increasing the strength of cement Rapid setting of cement Preventing rapid setting of cement Reduction in the cost of cement Increasing the strength of cement Rapid setting of cement Preventing rapid setting of cement ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following has pH value 7? HCl H2SO4 Sodium Carbonate Pure Water HCl H2SO4 Sodium Carbonate Pure Water ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is secondary air pollutant ? NO2 Dust particles Photochemical smog SO2 NO2 Dust particles Photochemical smog SO2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following metals can displace copper from copper sulphate solution ? Iron Gold Platinum Mercury Iron Gold Platinum Mercury ANSWER DOWNLOAD EXAMIANS APP
Chemistry Rusting of iron takes place due to Carbonation Oxidation Corrosion Exfoliation Carbonation Oxidation Corrosion Exfoliation ANSWER DOWNLOAD EXAMIANS APP
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