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प्रश्न
Evaporation takes place at ................. .
उत्तर
Evaporation takes place at all temperature.
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संबंधित प्रश्न
Evaporation takes place only from the surface of liquid.
Temperature of a liquid rises during boiling or vaporization
Boiling occurs at ....................
Heat is ................... during boiling.
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 |
Give reason for the increase in rate of evaporation of a liquid when air is blown above the liquid.
What is boiling? Explain it on the basis of molecular motion?
What is the change in average kinetic energy of molecules of a liquid during boiling at its boiling point?
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
Name two ways of change of liquid state to the vapour state and distinguish them.
