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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
Why is oxygen collected by downward displacement of water?
Why is hydrogen peroxide preferred in the preparation of oxygen gas ?
What happens when mercuric oxide is heated?
Fill in the blank :
____________ discovered the oxygen gas.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
How will you identify oxygen in the laboratory ?
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.
Tick (√ ) the most appropriate answer.
Sodium burns in oxygen with a flame which is :
Oxygen is a poor conductor of heat and electricity.
