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प्रश्न
What is evaporation?
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उत्तर १
“The change of state of a liquid to vapour at all temperatures from the surface of the liquid is called evaporation.”
उत्तर २
Evaporation is the process by which water changes its state from liquid to water vapour (gaseous state) due to heat from the Sun or any other heat source. It mostly occurs from water bodies, wet or irrigated soil, wet clothes, etc. Although mainly a daytime phenomenon, evaporation is a continuous process with varying degrees.
Factors that increase the rate of evaporation include clear skies, wind (which replaces moist air with dry air that can hold more moisture), an increase in surface area (like spreading wet clothes), and higher air temperatures (which increase the air’s capacity to hold water vapour).
संबंधित प्रश्न
Why does a desert cooler cool better on a hot dry day?
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
A liquid can change into vapour state at all temperatures.
Why is cooling produced on evaporation of a liquid?
Give two applications of evaporation.
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.
Define the following terms Condensation
How does the water kept in an earthen pot (matka) become cold during summer ?
How will you demonstrate that water vapour is present in air ?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.
