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प्रश्न
The most abundant element in the earth’s crust.
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उत्तर
Oxygen.
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संबंधित प्रश्न
What is the role of manganese dioxide in the preparation of oxygen?
Give four uses of oxygen.
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 _________.
How will you identify oxygen in the laboratory ?
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.
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
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.
Write fully balanced equation for the following :
Na2O + H2O →
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
