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प्रश्न
How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
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उत्तर
During boiling the heat energy supplied is used in increasing the energy of water molecule and hence the change of phase takes place. On recieving sufficient amount of energy it get converted into the gaseous state.
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संबंधित प्रश्न
All molecules of a liquid take part in the process of evaporation.
All molecules of a liquid take part in boiling.
Evaporation takes place 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 |
Comment on the statement ‘evaporation is a surface phenomenon’.
Why is cooling produced when a liquid evaporates?
Give reason for the increase in rate of evaporation of a liquid when surface area of liquid is increased.
Give reason for the increase in the rate of evaporation of a liquid when temperature of liquid is increased.
Name two ways of change of liquid state to the vapour state and distinguish them.
