Review on kinetic theory of particles

Review on kinetic theory of particles

Multiple Choice

Which among these is the correct description of property of liquid?

• A. liquid has no fixed volume and fixed shape

• B. liquid has fixed volume but does not have fixed shape

• C. particles of liquid are strongly attracted to one another but are still able to move slide past one another

• D. All of them are correct

The meaning of the word "properties"

• Properties are the characteristics of the object that can be observed

• Properties of liquid refers to the characteristics of LIQUID, not Particles of liquid, that we can observe

• Statement A and B are descriptions of properties of the object, but A is wrong description of properties of liquid.

• Statement C is the explanation for the properties of liquid, the reason why liquid has fixed volume but does not have fixed shape.

• Statement that includes the arrangement and behavior of particles usually refer to the explanation of the properties of the object

Multiple Choice

Which among these is the best explanation for solid has fixed volume and fixed shape?

• A. Solid does not follow the shape of the container

• B. Particles of solid have strong attraction with one another

• C. Particles of solid have fixed arrangement due to strong attractive forces among them and they only vibrate at fixed place

• D. Solid does not fill empty space

• Statement A and D are descriptions of the properties of solid, not the explanation why solid has fixed shape and volume. Statements A and B are the reason why we say that solid has fixed shape and volume.

• Statement C is the correct explanation why solid has fixed shape and volume. This statement gives the actual cause for solid having fixed shape and volume.

Multiple Choice

Which of the following statements correctly describe the behavior of particles in liquid?

• A. The particles of liquid can move slide past one another

• B. The particles of liquid are touching one another

• C. The attractive forces between particles of liquid are stronger than in gas but weaker than in gas

• D. Liquid can flow

• Statement B and C are not description about the behavior of particles of liquid, instead they belong to the arrangement of the particles of liquid.

• Statement D is description of property of liquid not the particles of liquid.

Multiple Choice

Sugar can dissolve in water. Which among these gives the best explanation why sugar can dissolve in water?

• A. Particles of sugar have fixed arrangement

• B. Particles of sugar and molecules of water can attract each other

• C. Particles of water can collide with the sugar crystal

• D. Molecules of water move freely

• Statement A is not relevant to explain why sugar can dissolve in water. Liquid food dye has no fixed arrangement of their particles but it can dissolve in water.

• Statement C is half correct since molecules of water are colliding with the crystal of sugar. However, sugar will not dissolve unless particles of sugar is attracted to water molecules.

• Statement D is wrong because molecules of water do not move freely. They move slide past one another.

Multiple Choice

Which among these statements gives the best explanation for diffusion of gas and liquid

• A. Gas and liquid does not have fixed shape

• B. Particles of gas and particles of liquid do not have fixed arrangement

• C. Particles in gas and particles in liquid are far apart from one another

• D. Particles of gas and particles of liquid can move from place to place

• Statement A is description of properties of gas and liquid. It does not give the reason why gas and liquid can diffuse

• Statement B is not correct to give explanation why diffusion takes place in gas and liquid since diffusion is not related to arrangement of particles, but behavior or movement of particles.

• Statement C is also incorrect since distance between particles refers to arrangement of particles and this is not the cause of diffusion.

Multiple Choice

The followings are the factors that affect the rate of diffusion, except

• temperature

• mass of the particles

• size of the particle

• distance between particles

• Temperature, mass or density of particle and the size of particle affect the rate of diffusion

• Distance between particles do not affect the rate of diffusion because diffusion is caused by the movement of particles. Particles may be part apart, however if the movement of particles is slow then diffusion would be slow. Particles may be close to one another, but if the particles can move from place to place faster then it would diffuse faster.