Physical Properties of Gases

Q.

Why gases do not have a definite volume?

Q. Is the following statement true or false?

Gases do not have a definite shape but they have definite volume.

1. True
2. False

Q.

Explain how bromine vapour diffuse into air

Q.

A gas exerts pressure on the walls of the container. Give reasons.

Q.

Define diffusion . explain its bromine vapour activity

Q.

Which of the following can be easily compressed? Liquid water or steam.

Q.

Give examples of the gas-gas mixture.

Q.

The molecules in matter have attraction between them. But gases do not have molecular attraction. Then, how is gas consider as a matter?

Q.

One word for the following:

Name the state of matter which can easily flow in all directions.

Q.

Brownian movement is faster in gases than liquids.

1. True
2. False

Q.

Which of the following statements explains why a gas fills the container in which it is kept?
(i) The particles in a gas are larger than those in a liquid.

(ii) The particles in a gas have very small attractive forces between them.
(iii) The particles in a gas are constantly moving very quickly.

1. (i) only

2. (ii) only

3. (i) and (ii)

4. (ii) and (iii)

Q.

Write any one property of liquids that differentiate them from gases.

Q.

Give reason: “Liquids cannot be compressed much”.

Q. Equal moles of H2 and O2 gases are placed in a container with pin hole through which both can escape . what fraction of the O2 escape in the time required for one half of the H2 to escape?

Q. Gases exert pressure in all directions. Explain.

Q.

_____ do not have any specific shape or size.

Q. Gases are highly compressible due to the _______.

1. very less intermolecular spaces
2. fixed volume
3. high density
4. weak intermolecular force

Q.

Which of the following occupies more volume for the same number of particles?

1. Solid

2. Liquid

3. Gas

4. Both liquids and gases occupy the same space.

Q. Define solids, liquids, and gases.

Q.

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

1. True

2. False

Q. The random movement of particles is maximum in gas.

1. True
2. False

Q. Which elements has neither definite shape nor volume?

1. Iodine
2. Sodium
3. Hydrogen
4. Lithium

Q. Match the property with the particular state of matter it corresponds to.

1. Solid
2. Liquid
3. Gas

Q. The intermixing of two or more gases is known as:

1. vaporization
2. diffusion
3. expansible
4. condensation

Q. Gases possess _______ inter molecular forces of attraction.

1. moderate
2. none of these
3. least
4. highest

Q. When heat is supplied to molecules their________energy increases.

1. Potential
2. Kinetic
3. Electrical
4. Chemical

Q. What is the shape of the gas in cylindrical can of deodorant?

1. Cubical
2. Cuboidal
3. Cylindrical
4. Spherical

Q.

Gases have:

1. Definite volume, definite shape and are not compressible

2. Definite volume no definite shape and are highly compressible

3. Definite volume definite shape and are slightly compressible.

4. No definite volume definite shape and are highly compressible

Q. Which of the following shows Brownian motion?

1. Both A and B

2. None of the above

3. Movement of dust particle in a ray of sunlight

4. Burning of a candle

Q. Gases exert pressure on the walls of the ________ .