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Kinetic Model of Matter

Total questions: 16

Worksheet time: 11mins

Name
Class
Date
1.
Which of the following properties cannot be explained by the kinetic theory of particle?
a)
Density
b)
Compressibility 
c)
Shape
d)
Colour
2.
Which of the following statements best explains why the fragrance of a perfume can move from one place to another?
a)
The perfume particles moves randomly in all directions on their own.
b)
The perfume particles expand their sizes when exposed to air.
c)
The perfume particles are carried by the air molecules.
d)
The perfume particles are moved by the wind.
3.
Which of the following is not a property of a solid?
a)
It expands a little when heated compared to a liquid
b)
It takes any shape of a container
c)
It is not easy to be compressed
d)
It usually has a higher density than a gas
4.
What would be the change when heat is supplied to a gas?
a)
The particles in the matter expand tremendously.
b)
The particles move randomly in all directions.
c)
The average kinetic energy of the particles increases.
d)
The particles contract and occupy lesser space.
5.
A container filled with a gas is heated without changing its volume. Which of the following statement is true?
a)
The average kinetic energy of gas particles decreases.
b)
The force exerted on the surface area of the wall increases.
c)
There is no change in pressure exerted on the walls of the containers.
d)
The temperature causes the gas particles to expand in size.
6.
The pressure of a fixed mass of gas increases when the volume of a container is reduced at a constant temperature. Which of the following best explains this statement?
a)
The size of the molecules decreases.
b)
The mass of the molecules increases.
c)
The average speed of the molecules increases.
d)
The molecules collide more frequently with one another and with the wall of container.
7.
Which of the following statements explains the Brownian motion of smoke particles?
a)
It is the collision between the smoke particles.
b)
It is the collision between the smoke particles and the wall of a container.
c)
It is the collision between the smoke particles and air particles.
d)
It is the collision between the smoke particles and the light.
8.
Which of the following statements is not correct when a fixed mass of gas in an enclosed container is heated?
a)
The pressure of the gas increases.
b)
The average distance between the gas molecules increases.
c)
The average kinetic energy of gas molecules increases.
d)
The frequency of the collisions of the gas molecules increases.
9.
Which of the following has the lowest density?
a)
Diamond
b)
Rock
c)
Water
d)
Helium
10.
When ice melts into water,
a)
the intermolecular force weakens and the molecules move slower.
b)
the intermolecular force weakens and the speed of molecules increases
c)
the intermolecular force becomes stronger and the molecules move faster.
d)
the intermolecular force becomes stronger and the speed of the molecules decreases.
11.

Which one is Boyle's law?

a)

pV = constant

b)

pT = constant

c)

p/V = constant

d)

p/T = constant

12.

What is the name of the process from gas to liquid?

a)

Melting

b)

Boiling

c)

Condensing

d)

Freezing

13.

What is the difference between evaporation and boiling?

a)

Evaporation and boiling happen at a certain temperature.

b)

Boiling happens on the surface of the liquid.

c)

Evaporation happens below the boiling point.

d)

Evaporation happens throughout the liquid.

14.

Which one is wrong about the evaporation?

a)

A liquid evaporates more rapidly when it is hotter.

b)

A liquid evaporates more when it has less surface area.

c)

A liquid evaporates more when a draught blows across its surface.

15.

Choose the correct answers orderly for the blanks.

....... is the change from a liquid to a gas at a temperature below the boiling point.

This happens because the ........... particles are most likely to escape from the liquid, causing the temperature of the liquid to ..............

a)

Boiling, energetic, increase

b)

Evaporation, energetic, decrease

c)

Boiling, energetic, decrease

d)

Evaporation, energetic, increase

16.

What causes smoke particles to move like this ?

a)

Air particles

b)

Water particles

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