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प्रश्न
How is oxygen naturally renewed in air ?
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उत्तर
All living beings use atmospheric oxygen in breathing and burning of fuels and in the formation of oxides of nitrogen. Yet amount of oxygen in the air remains more or less constant. This is because green plants return oxygen to the atmosphere by the process of photosynthesis.
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संबंधित प्रश्न
Why is oxygen collected by downward displacement of water?
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Oxygen occupies about ______ of air by volume.
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Oxygen is ___________ to litmus testing.
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State two characteristics of Acidic oxides.
Statement given below is incorrect. Write the correct statement :
Oxygen is prepared in laboratory by treating hydrogen oxide with manganese dioxide.
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