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प्रश्न
Boiling occurs at ....................
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उत्तर
Boiling occurs at a fixed temperature.
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संबंधित प्रश्न
All molecules of a liquid take part in the process of evaporation.
Temperature of a liquid rises during boiling or vaporization
All molecules of a liquid take part in boiling.
Evaporation takes place at ................. .
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 |
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’.
Give reason for the increase in rate of evaporation of a liquid when air is blown above the liquid.
What is the change in average kinetic energy of molecules of a liquid during boiling at its boiling point?
Name two ways of change of liquid state to the vapour state and distinguish them.
