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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
Two substances which undergo rapid oxidation.
Why is oxygen collected by downward displacement of water?
Name the three types of oxidation processes. In which of these large amount of heat and light energy are produced?
Fill in the blank :
____________ discovered the oxygen gas.
The natural way of adding oxygen to air which involves green plants is called
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Potassium nitrate crystals on heating strongly yield potassium nitrite and ________ gas.
Write ‘True’ or ‘False’ in front of following statement.
Under laboratory conditions, the oxygen gas is insoluble in water.
Write ‘True’ or ‘False’ in front of following statement.
Liquid oxygen is used for burning fuel in spaceships.
Give tests for oxygen gas.
Give reasons for the following:
patients suffering from lung problems are kept in an oxygen tent.
