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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
How does water kept in an earthen pot (matka) become cool during summer?
Why are volatile liquids such as alcohol and spirit stored in tightly closed bottles?
A patient suffering from high fever is advised to put wet clot strips on his forehead. Why?
Define the following term Freezing.
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
Give a geographical reason:
Air becomes saturated.
How does the water kept in an earthen pot remain cool?
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.
Comment on the following statements:
Evaporation produces cooling.
When lemon juice is mixed with soda water, they produce brisk effervescence.
