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प्रश्न
Fill in the blank:
Manganese dioxide acts as a _________.
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उत्तर
Manganese dioxide acts as a catalyst.
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संबंधित प्रश्न
What is the role of manganese dioxide in the preparation of oxygen?
Why is hydrogen peroxide preferred in the preparation of oxygen gas ?
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 blank:
Oxygen is slightly _________ than air.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
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.
Describe what you will observe and write fully balanced equation when the following is introduced in a jar of oxygen.
Burning magnesium
Write fully balanced equation for the following :
Na2O + H2O →
