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प्रश्न
Give reason for the increase in the rate of evaporation of a liquid when temperature of liquid is increased.
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उत्तर
Increase in temperature increases kinetic energy (K.E = `1/2` Mv2). More and more molecules come to the surface of liquid hence the rate of evaporation will increase with the increase in temperature.
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संबंधित प्रश्न
Evaporation is rapid on a wet day.
Temperature of a liquid rises during boiling or vaporization
The molecules of liquid ............. heat from surroundings in evaporation.
Cooling is produced in ....................
Match the column
| Column A | Column B |
| (a) Blowing air increases | (1) Increase in intermolecular separation |
| (b) Increase in pressure increases | (2) Pendulum of a clock |
| (c) Thermal expansion |
(3) Cooking utensils |
| (d) Invar | (4) Boiling point |
| (e) Pyrex glass | (5) Evaporation |
In evaporation
No heat is supplied to a liquid during evaporation. How does then the liquid change into its vapours?
Comment on the statement ‘evaporation is a surface phenomenon’.
What is boiling? Explain it on the basis of molecular motion?
Name two ways of change of liquid state to the vapour state and distinguish them.
