Chemistry In upper layer of atmosphere ozone is formed by The action of nitrogen on oxygen in atmosphere The action of ultraviolet rays on oxygen Subjecting oxygen to high pressure The combination of oxygen molecules The action of nitrogen on oxygen in atmosphere The action of ultraviolet rays on oxygen Subjecting oxygen to high pressure The combination of oxygen molecules ANSWER DOWNLOAD EXAMIANS APP
Chemistry An inert gas mixed with oxygen given to patients suffering from restricted breathing is Radon Helium Argon Krypton Radon Helium Argon Krypton ANSWER DOWNLOAD EXAMIANS APP
Chemistry The mass of one Avogadro number of helium atom is 1.00 gram 4.00 gram 4 x 6.02 x 1023 gram 8.00 gram 1.00 gram 4.00 gram 4 x 6.02 x 1023 gram 8.00 gram ANSWER DOWNLOAD EXAMIANS APP
Chemistry The acid rain destroys vegetations because it contains Carbon monoxide Ozone Nitric acid Sulphuric acid Carbon monoxide Ozone Nitric acid Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The name of plastic polymer from which combs, toys, bowls etc., can be made, is Teflon Polystyrene Metallic polysulphides Polyurethane Teflon Polystyrene Metallic polysulphides Polyurethane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is a natural dye ? Aniline blue Phenolphthalein Alizarin Crystal violet Aniline blue Phenolphthalein Alizarin Crystal violet ANSWER DOWNLOAD EXAMIANS APP
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