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प्रश्न
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
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उत्तर
The percentage of oxygen in air by volume, varies from 20.8% to 20.9%.
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संबंधित प्रश्न
Two substances which undergo rapid oxidation.
What is the role of manganese dioxide in the preparation of oxygen?
What happens when potassium nitrate is heated
Why is potassium chlorate not used for laboratory preparation of oxygen ?
Give four uses of oxygen.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
How will you obtain dry 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.
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
Write a note on the rusting process.
