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प्रश्न
Fill in the blank :
Oxygen occupies about _____% of air by volume.
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उत्तर
Oxygen occupies about 21% of air by volume.
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संबंधित प्रश्न
Two substances from which oxygen can be obtained at a large scale.
An oxide and a carbonate containing oxygen.
How is oxygen naturally renewed in air ?
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
The nitric oxide gas reacts with the oxygen and water vapour to form ______ vapour.
Statement given below is incorrect. Write the correct statement :
The oxygen gas turns moist blue litmus red.
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
Give reasons for the following:
patients suffering from lung problems are kept in an oxygen tent.
Mention the physical properties of oxygen.
Phosphorous bums with suffocating smell and gives ______.
