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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.
What happens when a glowing splinter is introduced in a jar containing oxygen ?
Fill in the blank:
Manganese dioxide acts as a _________.
State the precautions while preparing oxygen in the labo-ratory.
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 reason for the following:
Oxidation of sulphur results in a product which turns moist blue litmus red.
Write about the combustible property of Oxygen.
Write the reaction of oxygen with non–metals.
