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प्रश्न
What is the significance of water vapour in air?
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उत्तर
Significance of water vapour in atmosphere is as follows:
- Presence of water vapour in air determines the climatic conditions. Excessive water vapour causes rain. They also produce snow, fog, mist, hails and other phenomenon, depending upon the temperature.
- The presence of water vapour controls the rate of evaporation from the plants and animals.
- The presence of water vapour is very essential for the growth of plants.
- It is very essential for the health and comfort of animals.
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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.
Classify Carbon monoxide. Also give a balanced equation to prepare it.
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Tabulate the various components of air, including the components with variable composition.
Mention one necessary condition for the combustion to take place.
Why do traffic assistants wear a mask on duty?
When air is moving with cool and soothing, it is called a cyclone.
______ exists in nature as silicates, carbonates, oxides, and water. It also exists in a free state as part of the air in the atmosphere.
