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Oxygen
Carbon monoxide
Carbon dioxide
Ammonia
Which gas is used in filling electric bulbs?
Which gas is used in the food packaging industry to prevent chips from getting oxidized?
Which German mechanical engineer discovered X-rays?
Which has strongest force in nature
Which human organ is affected by consumption of food adulterant ?
Which hydrocarbon is formed by the action of sodium on ethyl iodide?
Which insect sits on uncovered food?
Which instrument is used for photographing the Sun
Which instrument is used to convert mechanical energy into electric energy
Which instrument is used to measure altitudes in aircrafts ?