the gas essential for combustion and respiration
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Oxygen is the gas essential for combustion and respiration.
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Oxygen is essential for respiration of living organisms, and it supports combustion because it is essential for burning components.
Burning of candles involves addition of oxygen to carbon & hydrogen which forms carbon dioxide , water vapour and energy in the form of heat and light.
Fuel + Oxygen → Carbon dioxide + water vapour + Energy (heat and light)
Respiration involves inhaling oxygen to carbon & hydrogen present in food material which forms carbon dioxide , water vapor and energy in the form of heat.
Glucose + Oxygen → Carbon dioxide + water vapour + Energy (heat)
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