Movement of Molecules

Q.

Which of the following diffuses fastest and which the slowest? Solid, Liquid and Gas. Give reasons for your answer.

Q. The molecules in a substance are in motion. What type of path do they follow?

Q.

Describe a simple experiment to illustrate that molecules are not at rest but they constantly move

Q.

The correct order of movement of molecules on the basis of rate of diffusion for solid, liquid and gas is:

1. Gases < Solids < Liquids

2. Gases > Solids > Liquids

3. Gases > Liquids > Solids

4. Gases < Solids > Liquids

Q.

The atoms and molecules in every matter are in continuous motion.

1. True
2. False

Q.

Name the physical state of matter:

Which particles do not undergo diffusion?

Q.

On heating food, the aroma of the hot sizzling food reaches us quickly.

1. True

2. False

Q.

On the basis of the kinetic theory of matter state two special properties which differentiate gases from solids and liquids.

Q.

Although an incense stick is placed far away from Rahul, he is still able to smell its pleasant odor. This phenomenon demonstrates which one of the following characteristics of matter?

1. Matter occupies space

2. Matter never moves

3. Motion of particles of matter

4. Attraction between particles of matter

Q.

what is common in three states of matter?

Q. The random movement of particles is more in .

1. solid
2. liquid
3. gas

Q.

Particles of matter possess kinetic energy and they are in constant motion.

1. True

2. False

Q.

Diffusion occurs __________ in a gas than in a liquid.

Q.

Define diffusion.

Q.

One word for the following:

Anything occupying space and having mass.

Q.

The smell of hot sizzling food reaches several meters away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?

1. Lower the temperature, higher the kinetic energy of food particles.

2. Higher the temperatures lower the kinetic energy of the food particles.

3. Higher the temperature, higher the kinetic energy of food particles.

4. Kinetic energy of food particles will not change irrespective to temperature.

Q.

As we increase the temperature, the kinetic energy of the particles _________.

1. first decreases then suddenly increases

2. decreases

3. remains same

4. increases

Q.

Which of the following pair will exhibit diffusion?

1. Sulphur powder & sugar

2. Tea bag & hot water

3. Rubber & iron particles

4. Salt and sand

Q. As we increase the temperature, the rate of diffusion .

1. increases
2. decreases
3. does not change.

Q.

Whenever a bottle of perfume is opened in a corner, we can identify its smell across the room. Choose the correct option of what happens in this process.

1. Perfume particles move from high concentration area to low concentration area.

2. Perfume particles spread through the gaps between the air particles.

3. Perfume particles undergo diffusion.

4. Perfume particles pass on their fragrance to air molecules.

Q. Why liquids diffuse slowly as compared to gases?

Q. what is the basic difference between diffusion and fusion?

Q.

Intermixing of particles of two different types of matter is called as:

1. Sublimation

2. Corrosion

3. Extraction

4. Diffusion