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प्रश्न
State three uses of oxygen, other than artificial respiration.
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उत्तर
Uses of oxygen are :
- Spaceships : Liquid oxygen is used for burning fuel in rockets and spaceships as there is no air in the space.
- Cutting and welding : Oxygen and hydrogen are made to bum in a specially designed torch. The oxy- hydrogen flame can easily melt metals and used for cutting and welding them.
- Chemical industry : Oxygen is used in large amount for preparing sulphuric acid from sulphur and nitric acid from ammonia.
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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.
Why is potassium chlorate not used for laboratory preparation of oxygen ?
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 _________.
Fill in the blank:
Manganese dioxide acts as a _________.
Fill in the blanks:
Oxygen is collected by the __________ displacement of ________.
(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 fully balanced equation for the following :
Na2O + H2O →
Give tests for oxygen gas.
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
