Characteristics of Particles of Matter

Q.

What are the different types of Intermolecular Forces?

Q.

Air is considered to be a matter because it has…….. and occupies…….

Q.

What is diffusion? Explain with suitable examples.

Q.

Air occupies space but does not have any mass.

1. True
2. False

Q.

Why do solids require more energy compared to liquids and gases for the movement of particles?

Q.

State the function of the following apparatus:

Beaker.

Q.

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?

1. Water, air, wind

2. Air, sugar, oil

3. Oxygen, water, sugar

4. Salt, juice, air

Q.

Which state of matter is most affected by temperature change?

Q.

An opaque paper when oiled becomes translucent. Give reasons.

Q. Which of the following are the examples of diffusion of gases?

1. Smell of food.
2. Smell of perfume.
3. Spreading of ink in water.
4. Fragrance of an incense stick.

Q.

In solids, the space between the particles is very less.

1. True
2. False

Q.

What is unique about an azeotropic refrigerant mixture?

Q. Which of the following substance is an example of a translucent material?

1. Steel
2. Glass
3. Oily paper
4. Plastic

Q. Which of the following is true about particles of matter?

1. They are small in size.
2. They are visible to naked eyes
3. They are not separated by spaces.
4. They are big in size.

Q. Which of the following pair will exhibit diffusion?

1. Tea bag and hot water
2. Salt and sand
3. Salt and sugar
4. Rubber and iron particles

Q. Thermal conduction can take place in:

1. solids only
2. liquids only
3. all of these
4. gases only

Q. Define:

(a) cohesive force

Q.

For liquefaction of gas :

1. Temperature and pressure should be high

2. Temperature should be low and pressure should be high

3. Temperature and pressure should be low

4. Temperature should be high and pressure should be low.

Q. Which of the following statements are correct?

1. Solids have definite shape and volume.
2. Liquids do not have a definite shape but have a definite volume.
3. Liquids have definite shape and volume.
4. Solids do not have a definite shape but have a definite volume.

Q.

Which of these isn't a characteristic of particles of matter?

1. Particles of matter have space between them.

2. Particles of matter are always in random motion.

3. Particles of matter attract each other.

4. Particles of matter are always tightly packed.

Q. Density of an object is defined as the of the object divided by its .

1. mass
2. volume
3. area
4. length

Q.

4. A pure substance is homogeneous in nature.

1. True
2. False

Q.

Arrange the following substances in the increasing order of intermolecular force of attraction.

Sugar, Air, Oil.

Q.

Tick (✔) the most appropriate answer.

The intermolecular forces of attraction between the particles of same substance is called-

1. adhesive forces

2. attractive forces

3. cohesive forces

4. any of these

Q.

Particles of one type of matter always fits between that of others.

1. False

2. True

Q.

Give reason for the following observation :

We can get the smell of perfume sitting several meters away.

Q.

What happens when water is added to kerosene?

1. Water floats above kerosene.

2. Kerosene floats above water.

3. They both mix well.

4. Kerosene reacts with water.

Q. Atoms are very small in size.

1. False
2. True

Q. When sugar molecules are dissolved in water, they occupy the space in between the water molecules.

1. False
2. True

Q. As temperature increases, the rate of diffusion _____.

1. increases and then decreases
2. decreases
3. increases
4. remains same