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प्रश्न
Write the percentage of the gases present in air.
उत्तर
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संबंधित प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Fill in the blank :
________ is the most abundant inert gas present in air.
What do you understand by the term polluted air?
Classify Water. Also give a balanced equation to prepare it.
Tick (√ ) the most appropriate answer.
Magnesium burns with a dazzling white flame to form magnesium oxide, a powdery mass. The colour of magnesium oxide is :
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Why do we see the sky and air clear and clean after rainfall?
Nitrogen is used in the food packaging industry because it _____.
