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Kinetic Theory of Matter MCQ ICSE CLASS 8

Updated: Mar 9




Tick (✔) The correct choice amongest the following

1. The quantity of matter present in a substance is called its : (a) weight(b) gram(c) mass(d) density


2. Which of the following substance undergoes sublimation ? (a) sodium chloride(b) ammonium chloride (c) sugar(d) sand

 

3. What is the correct term for the phase changes from solid to gas directly ? (a) sublimation(b) liquefaction(c) fusion(d) vaporization


4. Evaporation of a liquid can take place : (a) at its boiling point(b) at all temperatures(c) below its boiling point(d) at a fixed temperature


5. Which of the following is not matter ? (a) humidity(b) fog(c) blood(d) boiling point

Answers

Tick (✔) The correct choice amongest the following

1. (c) mass

2. (b) ammonium chloride

3. (a) sublimation

4. (c) below its boiling point

5. (d) boiling point

Worksheet

A. Choose the correct answer.


1. When this form of energy is supplied to a substance, its molecules move faster and


hence their kinetic energy increases. Name the form of energy.


(a) Wind energy (b) Heat energy


(c) Light energy (d) Electrical energy


2. What is the force of attraction that exists between similar kinds of molecules called?


(a) Force of interparticle (b) Force of crossparticle


(c) Force of interpath (d) Force of cohesion


3. The distance between the molecules of a substance is called the ______________.


(a) intermolecular force (b) cohesion space


(c) intermolecular distance (d) crossparticle space


4. The intermolecular forces are almost negligible; due to this the molecules are very


loosely packed. Which state of matter is being talked about?


(a) Light (b) Gas (c) Liquid (d) Solid


1. Matter

5. They have no fixed shape but fixed volume. They take the shape of the container


they are poured in. Which state of matter is being talking about?


(a) Liquid (b) Gas


(c) Solid (d) None of the above


Answers to Worksheet

A. 1. (b) 2. (d) 3. (c) 4. (b) 5. (a)

 

Write True Or False

1. The intermolecular forces in gases are weaker than in solids.


2. Liquids take the shape of the vessel.


3. All the three states of matter cannot be interconverted into one another.


4. The kinetic theory of matter explains the physical difference between solids, liquids and gases.