Chemistry Where does the oxygen that keeps us alive come from? Water Oxides of minerals Carbon dioxide Carbonates absorbed from soil Water Oxides of minerals Carbon dioxide Carbonates absorbed from soil ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which type of radiations are absorbed by the upper layer of the atmosphere? Infrared Radio-waves Visible Ultraviolet Infrared Radio-waves Visible Ultraviolet ANSWER DOWNLOAD EXAMIANS APP
Chemistry Commercial nitric acid is coloured because it contains dissolved : Nitrogen dioxide Coloured impurities Nitrous oxide Oxygen Nitrogen dioxide Coloured impurities Nitrous oxide Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Periodic table contains how many groups 16 19 18 17 16 19 18 17 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Combustion of a candle is a/an Endothermic reaction Physical change Exothermic reaction Photochemical reaction Endothermic reaction Physical change Exothermic reaction Photochemical reaction ANSWER DOWNLOAD EXAMIANS APP
Chemistry The antiparticle of an electron is Proton Positron Beta particles Alpha particles Proton Positron Beta particles Alpha particles ANSWER DOWNLOAD EXAMIANS APP
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