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प्रश्न
State three uses of oxygen, other than artificial respiration.
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
Two substances from which oxygen can be obtained at a large scale.
Two substances which undergo rapid oxidation.
Fill in the blank :
Oxygen occupies about _____% of air by volume.
Write ‘True’ or ‘False’ in front of following statement.
Under laboratory conditions, the oxygen gas is insoluble in water.
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 any four physical properties of oxygen gas.
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Give reason for the following:
Oxidation of sulphur results in a product which turns moist blue litmus red.
Mention the physical properties of oxygen.
