Movement of Molecules

Q. Ankita lit a perfume stick in the corner of a room. She could smell the perfume after sometime at the another corner. Which property explains this phenomenon?

1. Cooling
2. Diffusion
3. Evaporation
4. Heating

Q.

On increasing the temperature of a substance, the kinetic energy of its particles increases.

1. True

2. False

Q.

Assume a gas is stored in a container at room temperature. Identify the physical properties that are affected by the motion of the particles of the gas inside the container.

1. Kinetic Energy

2. Pressure

3. Potential Energy

4. Temperature

Q.

Is smoke an example of diffusion?

Q.

Kinetic energy is related to temperature.

1. False

2. True

Q.

The aroma of a hot sizzling food reaches quickly to us in comparison to that of a stale food.

1. False

2. True

Q. Arrange solid, liquid and gas in ascending order of their particle vibrations.

1. Solid < Liquid < Gas
2. Gas < Liquid < Solid
3. Liquid < Gas < Solid
4. Liquid < Solid < Gas

Q.

Among the following, identify the substance in which molecules possess vibratory, rotatory, and translator motions in all directions except in one direction

1. Bromine

2. Iodine

3. Ammonia

4. Silicon dioxide

Q.

Name the phenomenon which causes the following change

• A fragrance spreading into the room

Q.

Fill in the blank spaces by choosing the correct words from the list given below:

List: motion, space, mass, molecule, elements, atom, shape, changes, cohesion, rigid, hard, adhesion, intermolecular

The force of attraction between different kinds of molecules is called the force of __________.

Q.

Where we use diffusion in our daily life?

Q.

It is easy to move our finger in honey than in water because

1. Particles of honey are rigid.

2. Particles of honey have large intermolecular distance compared to gases.

3. Particles of honey attract each other.

4. Particles of honey repel each other.

Q.

Which property of the particles of a matter is directly related to the temperature?

1. Average kinetic energy

2. Interparticle repulsion

3. Interparticle space

4. Energy of the particles do not depend on temperature

Q. How do molecules move as a solid, liquid, and gas?

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

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

3. Higher the temperatures lower the kinetic energy of the 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. decreases

2. increases

3. remains same

4. first decreases and then increases.

Q.

Which of the following statements is incoorect

1. The particles of matter are very , very small

2. The particles of matter are attract one another

3. The particles of some of the matter are moving consantly

4. The particles of all matter have spaces between them