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प्रश्न
How will you obtain dry oxygen in the laboratory?
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उत्तर
Dry oxygen can be obtained if the gas so collected is passed f over a tower containing drying agents like phosphorus pentaoxide, fused calcium chloride or bubbling the gas through concentrated sulphuric acid. Then the dry gas is collected by downward displacement of mer – cury.
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संबंधित प्रश्न
Two substances from which oxygen can be obtained at a large scale.
What happens when oxygen gas is passed through alkaline pyrogallol solution ?
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 _________.
Why is potassium chlorate is not used for laboratory preparation of oxygen ?
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.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
The nitric oxide gas reacts with the oxygen and water vapour to form ______ vapour.
Write fully balanced equation for the following :
Na2O + H2O →
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Write a note on the rusting process.
