Chemistry The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is oxygen ozone helium methane oxygen ozone helium methane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Cloud is a colloidal dispersion of Water drops in a dispersion medium of air Fog in a dispersion medium of water Mist in a dispersion medium of air Air in a dispersion medium of water Water drops in a dispersion medium of air Fog in a dispersion medium of water Mist in a dispersion medium of air Air in a dispersion medium of water ANSWER DOWNLOAD EXAMIANS APP
Chemistry Tetra ethyle lead (TEL) is A reductant An antioxidant An antiknock compound A catalyst in burning fossil fuel A reductant An antioxidant An antiknock compound A catalyst in burning fossil fuel ANSWER DOWNLOAD EXAMIANS APP
Chemistry The natural source of hydro-carbon is Biomass Coal Carbohydrates Crude oil Biomass Coal Carbohydrates Crude oil ANSWER DOWNLOAD EXAMIANS APP
Chemistry The main buffer system of the human blood is NH2CONH2 - NH2CONH+ CH3COOH - CH3COO- H2CO3 - CO32- H2CO3 - HCO3 NH2CONH2 - NH2CONH+ CH3COOH - CH3COO- H2CO3 - CO32- H2CO3 - HCO3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The percentage of oxygen in air is approximately 1 0.21 0.01 0.78 1 0.21 0.01 0.78 ANSWER DOWNLOAD EXAMIANS APP
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