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प्रश्न
During boiling or vaporization
विकल्प
all molecules take part
temperature rises
no heat is absorbed
the average kinetic energy of molecules increases.
MCQ
उत्तर
all molecules take part
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Change of Liquid into Vapour State
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संबंधित प्रश्न
Evaporation is rapid on a wet day.
All molecules of a liquid take part in the process of evaporation.
Evaporation takes place at ................. .
The molecules of liquid ............. heat from surroundings in evaporation.
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 |
The boiling point of a liquid is increased by
Comment on the statement ‘evaporation is a surface phenomenon’.
Give reason for the increase in the rate of evaporation of a liquid when temperature of liquid is increased.
What is boiling? Explain it on the basis of molecular motion?
