Properties of Gases

Q.

A gas exerts pressure on the walls of its container because

1. The particles of a gas are static.

2. The particles of a gas react with each other.

3. The particles of a gas hit the walls of the container.

4. Particles of the gas react with the walls of the container.

Q. What is the example of diffusion of-
solid + solid=?

Q.

Why do gas diffuse at a fast rate?

Q. A perfume sprayed at one end of the room is spread throughout the room by the process of __________.

1. diffusion
2. evaporation
3. condensation
4. sublimation

Q.

Which of the following best describes the motion of particles in a liquid?

1. More freely moving as compared to gases
2. Completely static
3. More freely moving as compared to solids
4. Less freely moving as compared to solids

Q.

Write a note on the expansion of gases

Q.

Give examples of the liquid-gas mixture.

Q. Why does milk in a saucepan overflow ?

Q.

The fragrance of perfume spreads very fast. Mention the property of gases responsible for this.

Q. The intermixing of particles of two different type of matter on their own is called

Q.

20 A place where no air present will be called as what? Give example.

Q.

Mention three properties of the gaseous state. [3 MARKS]

Q. When a deodorant is sprayed, a person in another corner of the room can also smell the fragrance. The phenomenon responsible for this is called.

1. diffusion
2. brownian motion
3. saturation

Q.

Inter-molecular force of attraction is least in __________ and maximum in __________.

Q.

Oil is ______________ than water. (less dense/more dense)

Q.

The gas particles are easily compressible because of large intermolecular distances between its particles.

1. True

2. False

Q.

Gases are highly compressible.

1. True
2. False

Q.

Which of the following statements about oxygen are correct

1. Oxygen has a definite shape

2. Oxygen has no definite volume

3. Oxygen can be compressed.

4. Oxygen has any number of free surfaces.

Q.

Define the terms given below and answer the questions associated to each of them:

Liquids, Why do liquids flow?

Q.

At room temperature, the forces of attraction between the particles of solid substances are ___ than those which exist in the gaseous state.

1. stronger

2. weaker

3. same

4. depends

Q. The experiment shown below indicates that:

1. air has mass
2. air has oxygen
3. we can only feel air
4. air is compressible

Q. The particles of a gas fill a room due to:

1. Pouring
2. Diffusion
3. Osmosis
4. Flow

Q.

What is the shape of the gas present in a cylindrical can of deodorant?

1. Cubical

2. Cylindrical

3. Random shape

4. Spherical

Q.

What is diffusion? Give an example.

Q. What is a molecule? Give two examples.

Q.

Which of the following pair will exhibit diffusion?

1. Tea in tea bag and hot water

2. Sulphur powder and sugar

3. Sand from bucket and water

4. Salt and sand

Q.

Why solids do not flow?

Q.

Which of the following best describes gas?

1. No definite volume and no definite shape.

2. Definite shape and volume.

3. Definite volume and no definite shape.

4. Definite shape but no definite volume.

Q.

Intermixing of particles of two different types of matter is called as ______.

1. corrosion

2. extraction

3. diffusion

4. sublimation

Q.

Write the properties of gases.