Characteristics of Particles of Matter

Q.

Describe an activity to show that the particles of matter are very small.

Q.

Why does water curve downward when placed in a glass tube

Why do other liquids curve upward if placed in glass tube

Q.

What is the structure of matter?

Q.

Explain kinetic theory of matter in the case of evaporation?

Q.

How is perfume an example of diffusion?

Q. The force of attraction between different types of molecules is called the force of_______.

1. Force of adhesion
2. Force of cohesion
3. Force of nuclear
4. Force of friction

Q.

COHESION is the force of attraction between molecules of ____________ substances

Q.

Describe the movement of particles when the kinetic energy of solid liquid and gas increases or decreases?

Q.

What are forces of adhesion and cohesion

Q. The density of aluminium is $2.7gc{m}^{-}3$ and that of brass is $8.4gc{m}^{-3}$ The correct statement regarding this information is:

1. The volume of a certain mass of brass is more than the volume of an equal mass of aluminium
2. Equal volumes of aluminium and brass have equal masses.
3. The mass of a certain volume of brass is more than the mass of an equal volume of aluminium.
4. Equal masses of aluminium and brass have equal volumes.

Q.

The intermolecular force of attraction is the strongest in gases

1. True
2. False

Q.

The particles are in constant random motion due to

1. inter-particle space

2. inter-particle attraction

3. Kinetic energy

4. heat

Q.

As the distance between the particles of matter increases, force of attraction between them also increases.

1. True
2. False

Q. A measure of average kinetic energy of the particles of a substance is its:

1. Temperature
2. Pressure
3. Heat energy
4. Mass

Q.

The density of brass is 8.4 g $c{m}^{-}3$. What do you mean by this statement?

Q. Molecules are in a state of continuous motion and accordingly, molecules possess __________.

1. Potential energy
2. Static energy
3. Kinetic energy
4. None of these

Q.

The inter-particle force of attraction and the kinetic energy of the particles do not determine the physical state of any matter.

1. True

2. False

Q.

The molecules of matter repel each other with a greater force.

1. True

2. False

Q.

The intermolecular force is the strongest in

1. (a) solids

2. (b) gases

3. (c) liquids

4. (d) both b and c

Q. More is the space between the particles of the matter; more is the force of attraction between them.

1. True
2. False

Q.

Intermolecular forces are

1. directly proportional to intermolecular distances.

2. inversely proportional to intermolecular distances.

3. None of these

4. Intermolecular forces does not depend on intermolecular distances.

Q.

Attraction and repulsion are the characteristics shown by particles of matter.

1. Attraction

2. Love

Q.

Give some examples of matter

Q.

Define inter-particle forces?

Q.

The intermolecular force is the weakest in

1. (a) solids

2. (b) liquids

3. (c) gases

4. (d) both b and c

Q. Spray some mercury and some water on a glass surface. It will be observed that mercury forms _______ drops while water _______.

1. Circular, sticks to glass
2. Circular, spreads
3. Spherical, spreads
4. Sticky, spreads

Q.

In which of the following diffusion occurs at faster rate?

1. Sugar solution

2. Drinking water

3. Air

4. Salty water

Q.

The diver is able to cut through water in a swimming pool. Why? [3 MARKS]

Q. If everything in this universe is made of atoms than what about dark matter

Q.

Matter in any form is made up of ________.