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प्रश्न
Fill in the blank :
Oxygen occupies about _____% of air by volume.
उत्तर
Oxygen occupies about 21% of air by volume.
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संबंधित प्रश्न
What happens when mercuric oxide is heated?
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphur dioxide gas, precipitation, helium
Every nine parts of water by weight contains eight parts by weight of _________.
Fill in the blank:
Manganese dioxide acts as a _________.
Fill in the blank:
Oxygen is ___________ to litmus testing.
Give balanced equation to obtain oxygen from Silver oxide.
Describe what you will observe and write fully balanced equation when the following is introduced in a jar of oxygen.
Burning magnesium
Write fully balanced equation for the following :
SO2 + H2O →
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Mention the physical properties of oxygen.
