Gaseous State

Q.

Question 2 (a)
(a) Tabulate the differences in the characteristics of states of matter.

Q.

What are the measurable properties of gases?

Q.

Why do gases have low densities?

Q.

Why does gases exert pressure?

Q.

Solids are generally denser than liquids because

1. the particles are loosely packed in solids than in liquids.

2. the particles are closely packed in solids than in liquids.

3. the particles of solids have lesser weight than the particles
   of liquids.

4. none of these

Q.

Gases do not have a definite shape but have a definite mass.

1. True
2. False

Q.

Solids possess high density.

1. True
2. False

Q. Solids have a shape , occupy a definite volume and generally have densities.

1. definite
2. varying
3. indefinite
4. low
5. high

Q. When sugar is dissolved in water, it disappears because the sugar particles _________ .

1. settle down at bottom
2. are constantly moving
3. get into intermolecular spaces
4. are too small to be seen

Q.

Inter-particle space is maximum in

1. Solid

2. Liquid

3. Gases

4. All the above

Q.

Say whether it describes a solid, a liquid or a gas.

Particles are far apart and move in all directions.

Q.

Give the difference between solids liquids and gases with regards to diffusion

Q.

What are the following called?

Solids that do not have definite geometrical forms. Give any two examples.

Q.

State the reason for gases not having either a definite shape or a definite volume.

Q. Solids don't have a fixed shape.

1. True
2. False

Q. ) Whose heating capacity is maximum: CNG, LPG, petrol? Give reasons. (b) Natural gas is a clean fuel. Justify giving three points

Q. The density of water is more than ice.

1. true
2. false

Q.

The pressure exerted by the gas is because of:

1. particles of gas hitting each other.

2. particles of gas hitting the walls of the containers.

3. gas particles have less inter molecular force between them.

4. particles of gas being highly compressible.

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.

Arrange solid, liquid and gas on the basis of rate of diffusion in ascending order.

1. solid < liquid < gas

2. gas <solid < liquid

3. liquid < gas < solid

4. liquid < solid < gas

Q. Liquids and gases attain the shape of the closed container in which they are kept.

1. False
2. True

Q. Choose the correct properties of gases.

1. Definite shape
2. Indefinite volume
3. High miscibility
4. No miscibility
5. No definite shape
6. Low density
7. Highly rigid
8. No rigidity

Q.

Why do gases exert pressure?

1. Particles of gases hit each other

2. Particles of gases hit the walls of the container

3. Particles of gases are highly compressible

4. Gas particles have high intermolecular forces of attraction

Q. Gases are more compressible than solids and liquids.

1. True
2. False

Q. Gases have a very strong interparticle force of attraction.

1. True
2. False

Q. Solids Have greater densities than liquids and gases. (give reason)

Q. Match the following.

1. is more than solids
2. is less than solids
3. in all the directions

Q. Pair the following as solid-solid, liquid-liquid and gas-gas at room temperature.

1. Bromine
2. Rock
3. Sponge
4. Helium
5. Mercury
6. Oxygen