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Question
During boiling or vaporization
Options
all molecules take part
temperature rises
no heat is absorbed
the average kinetic energy of molecules increases.
MCQ
Solution
all molecules take part
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Change of Liquid into Vapour State
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RELATED QUESTIONS
Evaporation takes place only from the surface of liquid.
All molecules of a liquid take part in the process of evaporation.
All molecules of a liquid take part in boiling.
Boiling occurs at ....................
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 |
In evaporation
The rate of evaporation of a liquid increases when:
Do all the molecules of a liquid take part in evaporation? If not, explain your answer.
Name two ways of change of liquid state to the vapour state and distinguish them.
