Ultraviolet rays are absorbed by ______ of atmosphere., Ozone layer, Troposphere, Ionosphere, Biosphere, Auroras appear in the layer of atmosphere which is known as, Troposphere, Ionosphere/ Thermosphere, Stratosphere, Exosphere, ______ depletes the ozone layer., carbon di oxide, CFC's, Nitrogen, Oxygen, The ______ alters the rate of reaction., Catalyst, Reactant, product, none of thes, In the laboratory preparation of oxygen from hydrogen peroxide, ______ is used as a catalyst., Copper sulphate, Manganese di oxide, Sodium chloride, Sodium hydroxide, _____ gas is evolved when metal carbonates are treated with dilute acids., Nitrogen, Carbon di oxide, Helium, Hydrogen, The solid carbon dioxide is commonly called ______., Dry ice, Solid Gas, Frozen carbon, Snow, _______, an inert gas is used to fill weather observation balloons., Ne, Ar, He, Xe, The chemical formula of rust is _______., FeO, Fe2O3, Fe3O4, Fe2O3.xH2O, The trapping of solar heat energy by certain gaseous molecules present in the earth’s atmosphere is called ______., Ozone depletion, Green House effect, Acid rain, Global warming
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Chemistry
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