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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
The most abundant element in the earth’s crust.
Why is oxygen collected by downward displacement of water?
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
Statement given below is incorrect. Write the correct statement :
The oxygen gas turns moist blue litmus red.
Write ‘True’ or ‘False’ in front of following statement.
Under laboratory conditions, the oxygen gas is insoluble in water.
State any four physical properties of oxygen gas.
Describe what you will observe and write fully balanced equation when the following is introduced in a jar of oxygen.
Burning magnesium
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
Write about the combustible property of Oxygen.
Write a note on the rusting process.
