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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.
What is nitrogen-fixation?
What are the two ways in which nitrogen fixation occurs?
Complete and balance the following chemical equation.
CaO + H2O → ____________
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
Carbon dioxide with water changes
What is the presence of harmful substance in the air called?
Oxygen is used to oxidize ______.
Mountaineers carry oxygen cylinders with them because ______.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Carbon dioxide
