🎯 Knowledge Check

Chemistry — Matter In Our Surroundings

50 Questions Class 9 MCQs
25:00 ⏱ Time
⚡ Progress 0 / 50 answered
1
Which of the following is NOT a characteristic of particles of matter?
2
The smell of perfume spreads in a room due to:
3
The process of mixing of particles of two different types of matter on their own is called:
4
Matter is made up of:
5
Which of the following shows diffusion most quickly?
6
Which of the following has a definite shape and volume?
7
Liquids have:
8
Gases have:
9
Which of the following is most compressible?
10
The force of attraction is maximum in:
11
Conversion of solid into liquid is called:
12
The fixed temperature at which a solid changes into liquid is called:
13
At 1 atm pressure, ice melts at:
14
The temperature at which liquid changes to vapour at atmospheric pressure is called:
15
The SI unit of temperature is:
16
Solid CO? is called:
17
Conversion of gas to liquid is called:
18
The process in which a solid directly changes into vapour is called:
19
The amount of heat required to change 1 kg of solid into liquid at its melting point is called:
20
Latent heat of vaporisation of water is:
21
The process of conversion of liquid into vapour below its boiling point is called:
22
Evaporation increases with:
23
The cooling caused by evaporation is due to:
24
On increasing humidity, the rate of evaporation:
25
Why does a desert cooler cool better on a hot dry day?
26
Why do we feel cool when water evaporates from our body?
27
Wet clothes dry faster in:
28
Which of the following factors does NOT affect evaporation?
29
The phenomenon of cooling by evaporation is employed in:
30
Why do we perspire more in summer?
31
Camphor disappears when kept in open air due to:
32
Which state of matter has minimum compressibility?
33
Which state of matter can be easily compressed?
34
At high altitude, water boils at:
35
Which of the following is an example of condensation?
36
Which phenomenon is responsible for water droplets on outer surface of a glass filled with ice water?
37
The SI unit of pressure is:
38
Which of the following shows both evaporation and diffusion?
39
What happens to particles of matter when heat is supplied?
40
The boiling point of water at sea level is:
41
Why do liquids flow?
42
Which is not a state of matter studied in Class 9 NCERT?
43
Drying of wet hair in sunlight is due to:
44
Which gas is known as "dry ice" when solidified?
45
Why do we see fog in winters?
46
Interconversion of states of matter can be achieved by:
47
What happens to the boiling point of water if pressure is increased?
48
Which of the following is not a pure substance?
49
Clouds are formed due to:
50
Which property of matter explains why a gas fills the entire container?

Frequently Asked Questions

Matter is anything that has mass and occupies space.

The three states of matter are solid, liquid, and gas.

Particles of matter have space between them, move continuously, and attract each other.

Gases can be compressed because their particles are far apart and can come closer on pressure.

Diffusion is the mixing of particles of two substances due to particle motion.

Solid state has definite shape and fixed volume.

Gaseous state has neither fixed shape nor fixed volume.

Liquids take the shape of the container they are kept in.

Because gases have very large intermolecular spaces between particles.

On heating, particles gain energy and move faster, increasing the distance between them.

The transformation of matter from one state to another, like solid to liquid, is change of state.

The constant temperature at which a solid melts to form a liquid is the melting point.

The constant temperature at which a liquid changes into a gas is its boiling point.

Sublimation is the process where a solid changes directly into gas without becoming liquid.

Camphor and ammonium chloride show sublimation.

Recent Posts

    Matter in Our Surroundings – Learning Resources

    Detailed Notes
    True / False
    NCERT Solutions

    Get in Touch

    Let's Connect

    Questions, feedback, or suggestions?
    We'd love to hear from you.