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प्रश्न
Fill in the blank :
Oxygen occupies about _____% of air by volume.
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उत्तर
Oxygen occupies about 21% of air by volume.
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संबंधित प्रश्न
What is the role of manganese dioxide in the preparation of oxygen?
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.
What happens when Magnesium burns in oxygen ? Also give the balanced chemical equation for the reaction.
Give balanced equation to obtain oxygen from Silver oxide.
How will you obtain dry oxygen in the laboratory?
Complete and balance the following equation
\[\ce{N2 + O2 ->[3000°C]}\]
Tick (√ ) the most appropriate answer.
Sodium burns in oxygen with a flame which is :
Describe what you will observe and write fully balanced equation when the following is introduced in a jar of oxygen.
Burning magnesium
Give reasons for the following:
patients suffering from lung problems are kept in an oxygen tent.
