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प्रश्न
What is not true about air?
पर्याय
It makes the windmill rotate.
It helps in the movements of aeroplanes.
Birds can fly due to presence of air.
It has no role in water cycle.
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उत्तर
It has no role in water cycle.
Explanation:
During the process of evaporation, the vapours of water are risen up by air to form clouds.
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संबंधित प्रश्न
What are the causes of air pollution?
Name the main components of air.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
_______ gas is used for filling weather observation balloons.
Write down the composition of three main gases present in air by volume.
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
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
What is the source of oxygen gas in air?
Why do we see the sky and air clear and clean after rainfall?
The main component of air is oxygen.
When cooled to -57°C, gaseous carbon-di-oxide becomes a liquid.
