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प्रश्न
Fill in the blank:
Oxygen occupies about ______ of air by volume.
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उत्तर
Oxygen occupies about 1/5 th of air by volume.
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संबंधित प्रश्न
Two substances from which oxygen can be obtained at a large scale.
What is the role of manganese dioxide in the preparation of 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:
Oxygen is slightly _________ than air.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
Complete and balance the following equation
S + O2 →
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Phosphorus pentaoxide on dissolving in water forms _________ acid.
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
Give tests for oxygen gas.
