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प्रश्न
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
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उत्तर
The percentage of oxygen in air by volume, varies from 20.8% to 20.9%.
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संबंधित प्रश्न
Two substances from which oxygen can be obtained at a large scale.
Fill in the blank:
Oxygen is slightly _________ than air.
Fill in the blanks:
Oxygen is collected by the __________ displacement of ________.
What happens when Sulphur burns in oxygen ? Also give the balanced chemical equation for the reaction.
How will you identify oxygen in the laboratory ?
Complete and balance the following equation
\[\ce{N2 + O2 ->[3000°C]}\]
(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 reasons for the following:
patients suffering from lung problems are kept in an oxygen tent.
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Mention the physical properties of oxygen.
