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प्रश्न
Fill in the blank:
Oxygen occupies about ______ of air by volume.
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उत्तर
Oxygen occupies about 1/5 th of air by volume.
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संबंधित प्रश्न
The most abundant element in the earth’s crust.
Two substances from which oxygen can be obtained at a large scale.
Fill in the blanks:
Oxygen is collected by the __________ displacement of ________.
What happens when Magnesium burns in oxygen ? Also give the balanced chemical equation for the reaction.
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.
Write ‘True’ or ‘False’ in front of following statement.
Liquid oxygen is used for burning fuel in spaceships.
Tick (√ ) the most appropriate answer.
When sulphur burns in oxygen, the colour of the flame is :
(a) Starting from hydrogen peroxide how is oxygen gas prepared in laboratory?
(b) What is the function of manganese dioxide?
(c) Write fully balanced equation for the liberation of oxygen from hydrogen peroxide.
(d) Why is the above method preferred to any other method?
State three uses of oxygen, other than artificial respiration.
Write the reaction of oxygen with non–metals.
