Evaporation takes place at ................. .

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Evaporation takes place at all temperature.

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Change of Liquid into Vapour State

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Chapter 6: Heat Transfer - Objective questions [Page 119]

Chapter 6 Heat Transfer
Objective questions | Q 2.02 | Page 119

Evaporation is rapid on a wet day.

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

Do all the molecules of a liquid take part in evaporation? If not, explain your answer.

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 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.

What is boiling? Explain it on the basis of molecular motion?

Name two ways of change of liquid state to the vapour state and distinguish them.