The boiling point of a liquid is increased by

MCQ

increasing the pressure, on liquid

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Change of Liquid into Vapour State

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पाठ 6: Heat Transfer - Objective questions [पृष्ठ १२०]

पाठ 6 Heat Transfer
Objective questions | Q 4.4 | पृष्ठ १२०

Evaporation is rapid on a wet day.

All molecules of a liquid take part in boiling.

Boiling occurs at ....................

Cooling is produced in ....................

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

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

Give reason for the increase in rate of evaporation of a liquid when air is blown above the liquid.

Give reason for the increase in rate of evaporation of a liquid when surface area 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.