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प्रश्न
Give a reason why water droplets appear on the outer surface of a tumbler containing ice.
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उत्तर
Water vapour present in air, condenses on the cooler surface of the tumbler. Hence they condenses into tiny water droplets.
संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Write ‘True’ or ‘False’ in front of following statement.
The area where a lot of fuel burns has more percentage of carbon dioxide.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
Give word equation for the following conversion:
Nitric oxide to nitrogen dioxide
How will you prove that soil contains air in it?
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
What was the old name of nitrogen?
Air also contains a small amount of carbon-di-oxide, water vapour, and some other gases like argon,
