Effect of Pressure on Matter

Q. The value of compression factor at the critical state of a vander waals gas is

Q.

Give a simple experiment to show that gases expand on heating.

Q.

What is dry ice? What is its main application?

Q.

In which of these states of matter is the effect of pressure highest?

1. Solids

2. Liquids

3. Gases

4. Effect of pressure is same on all three states

Q.

How is radiation pressure detected?

Q. Two gases A and B are kept in two cylinder and allowed to diffuse through a smallhole . If the time taken by gas A is four times the time taken by gas B for difusion of equal volume of gas under similar conditions of temperature and pressure , what will be the ratio of their molecules masses ?

Q. Identify the physical state of matter which can be easily compressed.

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

Q.

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

In a solid, the particles occupy a ________ positions.

1. Brownian

2. Higher

3. Stronger

4. Melting

5. Liquid

6. Fixed

Q.

1. Match the following :

Column 1	Column 2
(a) Solids	(i) Can flow in all directions.
(b) Sublimation	(ii) The temperature at which a liquid changes into its gaseous state.
(c) Boiling point	(iii) Can have any number of free surfaces.
(d) Gases	(iv) Gaps between particles.
(e) Intermolecular space	(v) Change of state directly from solid to gas.

Q. Explain why a substance expands on heating.

Q. Reducing temperature and applying high pressure on a gas can lead to:

1. Evaporation
2. Liquefaction
3. Sublimation
4. Diffusion

Q. Applying pressure and reducing temperature can liquefy gases.

1. True
2. False

Q.

The density of ice is ___________ that of water.

1. higher than

2. same as

3. very high than

4. lower than