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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
Taking hydrogen peroxide, how would you prepare oxygen in the laboratory ?
What happens when oxygen gas is passed through alkaline pyrogallol solution ?
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
Fill in the blanks:
Oxygen is collected by the __________ displacement 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
The nitric oxide gas reacts with the oxygen and water vapour to form ______ vapour.
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.
Liquid oxygen is used for burning fuel in spaceships.
(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?
Give reason for the following:
Oxidation of sulphur results in a product which turns moist blue litmus red.
