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प्रश्न
Heat is ................... during boiling.
रिक्त स्थान भरें
उत्तर
Heat is absorbed during boiling.
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Change of Liquid into Vapour State
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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.
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?
Why is cooling produced when a liquid evaporates?
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?
