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प्रश्न
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.
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उत्तर
Phosphorus pentaoxide on dissolving in water forms phosphoric acid.
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संबंधित प्रश्न
Why is oxygen collected by downward displacement of water?
Give four uses of oxygen.
Fill in the blank :
Oxygen occupies about _____% of air by volume.
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 _________.
State the precautions while preparing oxygen in the labo-ratory.
How will you obtain dry oxygen in the laboratory?
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
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.
Phosphorous bums with suffocating smell and gives ______.
