(B) Evaporation is a surface phenomenon in which liquid molecules at the surface,having higher kinetic energy than the average,escape into the vapour

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The phenomenon of change of a liquid into vapours at any temperature below its boiling point.

(B) Evaporation is a surface phenomenon in which liquid molecules at the surface,having higher kinetic energy than the average,escape into the vapour state at any temperature below its boiling point.This process leads to a cooling effect in the remaining liquid.

Class 9 Science MATTER IN OUR SURROUNDINGS Mix Example - MATTER IN OUR SURROUNDINGS

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What is evaporation?

A
The process of conversion of a solid into a liquid.
B
The phenomenon of change of a liquid into vapours at any temperature below its boiling point.
C
The process of conversion of a gas into a liquid.
D
The process of conversion of a liquid into a solid.

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MATTER IN OUR SURROUNDINGS

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Mix Example - MATTER IN OUR SURROUNDINGS

State whether the following statement is true or false:
The term $vapor$ describes the gaseous state of a substance that normally exists as a liquid or solid.

Easy

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$(a)$ What temperature in Kelvin scale is equal to $50^{\circ} C$?
$(b)$ Describe an activity to show that the rate of evaporation increases with surface area.

Medium

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$A$ few substances are arranged in the increasing order of 'forces of attraction' between their particles. Which one of the following represents a correct arrangement?

Easy

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Name the state of matter in which
$(i)$ layers of particles can slip and slide over one another easily.
$(ii)$ particles just move around randomly because of very weak force of attraction.

Easy

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Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends,she got confused. Help her to identify the correct set of conditions.

Medium

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What is evaporation?

Similar Questions

State whether the following statement is true or false:The term $vapor$ describes the gaseous state of a substance that normally exists as a liquid or solid.

$(a)$ What temperature in Kelvin scale is equal to $50^{\circ} C$?$(b)$ Describe an activity to show that the rate of evaporation increases with surface area.

$A$ few substances are arranged in the increasing order of 'forces of attraction' between their particles. Which one of the following represents a correct arrangement?

Name the state of matter in which$(i)$ layers of particles can slip and slide over one another easily.$(ii)$ particles just move around randomly because of very weak force of attraction.

Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends,she got confused. Help her to identify the correct set of conditions.

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Exam Paper Generator

Online Exam Module

State whether the following statement is true or false:
The term $vapor$ describes the gaseous state of a substance that normally exists as a liquid or solid.

$(a)$ What temperature in Kelvin scale is equal to $50^{\circ} C$?
$(b)$ Describe an activity to show that the rate of evaporation increases with surface area.

Name the state of matter in which
$(i)$ layers of particles can slip and slide over one another easily.
$(ii)$ particles just move around randomly because of very weak force of attraction.