Solids, Liquids & Gases Test 1

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Solids, Liquids & Gases Test 1

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Weekly Quiz Competition

Question 1
1 / -0

After washing the clothes Aman's mother took them out for drying. But the weather was very humid. What should Aman do?

A
Explain about the concept of evaporation

B
Help his mother in taking the clothes back inside.

C
Both (a) and (b)

D
None of the above.

Solution

Humidity is the amount of water present in the air. The air around us cannot hold more amount of water vapour at a given temperature. If the amount of water in the air is already high. Then the rate of evaporation decreases.

Now on a humid day, the air already has a sufficient amount of water vapour present. As the result, the rate of evaporation decreases and hence it takes longer to dry wet clothes in humid weather.
Question 2
1 / -0

Study the diagram and choose the correct option.

A

B

C

D

Solution

Matter has 3 states - Solid, Liquid and Gas.
Question 3
1 / -0

Read the sentences carefully and choose the correct option.

A. Gases are harder to compress than solids.
B. Liquids are harder to compress than gases.
C. Liquids are harder to compress than solids.
D. Liquids can freeze.

A
FTFT

B
TFTF

C
TTFF

D
FFTT

Solution

Gases are easier to compress than solids. Liquids are easier to compress than solids.
Question 4
1 / -0

Which of the following can vary in volume?

A

B

C

D

Solution

Mass - it does'nt vary

Volume - it vary as it expands on heating and contracts on cooling

Density - it varies as it is inversely proportional

Therefore, the volume of balloons can be changed.
Question 5
1 / -0

Which matter is normally hard?

A
Liquid

B
Solid

C
Gases

D
All of these

Solution

In the solid state, the individual particles of a substance are in fixed positions with respect to each other because there is not enough thermal energy to overcome the intermolecular interactions between the particles. As a result, solids have a definite shape and volume. Most solids are hard.
Question 6
1 / -0

Choose the correct option from the following on the basis of the packing of molecules.

A
Solid > Liquid > Gas

B
Gas > Solid > Liquid

C
Liquid > Gas > Solid

D
Solid > Gas > Liquid

Solution

Solid > Liquid > Gas. Solids have the most tightly packed molecules and gases have the least packed molecules.
Question 7
1 / -0

Read the statements carefully and choose the correct option.

Statement A: In solids the molecules are packed the closest together.
Statement B: In gases the molecules are spread out the most.

A
Statement A is correct B is wrong,

B
Statement B is correct A is wrong.

C
Both the statements are correct,

D
Both the statements are wrong.

Solution

Solid > Liquid > Gas. Solids have the most tightly packed molecules and gases have the least packed molecules.
Question 8
1 / -0

When a gas changes into a liquid, it is called _______.

A
evaporation

B
condensation

C
solidification

D
melting

Solution

Conversion of gases into liquids is called condensation.
Question 9
1 / -0

Which of these is a characteristic property of gases?

A
Gases are not at all rigid.

B
Gases are not compressible.

C
Gases have particles in fixed positions,

D
Gases have high density.

Solution

Gases are not at all rigid.
Question 10
1 / -0

The conversion of matter from solid state to liquid state is called ________.

A
evaporation

B
melting

C
condensation

D
freezing

Solution

The process of conversion of solid state to liquid state is called melting.