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प्रश्न
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
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उत्तर
In the laboratory preparation of oxygen from potassium chlor¬ate, manganese dioxide acts as a catalyst i.e. it increase the rate of production of oxygen without getting itself consumed.
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संबंधित प्रश्न
A chemical called oxygenated water.
What is the role of manganese dioxide in the preparation of oxygen?
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 blank:
Oxygen occupies about ______ of air by volume.
How will you obtain dry oxygen in the laboratory?
Fill in the blank space by choosing the correct word from the given list.
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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 ‘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?
Write the reaction of oxygen with non–metals.
