Class 8 Science Chapter 10 MCQ (Multiple Choice Questions) of Sound for CBSE and State board students prepared for new academic session 2025-26 free to use. All the contents are prepared from latest NCERT Books issued for new academic session 2025-26. Now a days MCQs are important part of question papers in exams. These MCQ contains all the important extra questions covering the complete chapter of NCERT Book class 8 Science chapter 10.

Class 8 Science Chapter 10 MCQ

Class: 8Science
Chapter: 10Sound
Contents: MCQ Online Tests
Academic Session:2025-26

MCQ Tests with Answers for Class 8 Science Chapter 10

Q1

In order to reduce the loudness of a sound, we have to:

[A]. Decrease its frequency of vibration of the sound.
[B]. Increase its frequency of vibration of the sound.
[C]. Decrease its amplitude of vibration of the sound.
[D]. Increase its amplitude of vibration of the sound.
Q2

Loudness of sound is measured in units of

[A]. Decibel (dB)
[B]. Hertz (Hz)
[C]. Metre (m)
[D]. Metre/second (m/s)
Q3

The loudness of sound is determined by its:

[A]. Amplitude of vibration
[B]. Ratio of amplitude and frequency of vibration
[C]. Frequency of vibration
[D]. Product of amplitude and frequency of vibration
Q4

Vikash is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?

[A]. When the muscles of vocal cords contract and stretch, the vocal cords become tight and thin and a sound of high frequency is produced.
[B]. When the muscles relax, the vocal cords become loose and thick and a sound of low frequency is produced.
[C]. Due to the shorter vocal cords, the frequency or pitch of a woman’s voice is higher than that of a man.
[D]. None of the above.
Q5

Pitch of sound is determined by its

[A]. Frequency
[B]. Amplitude
[C]. Speed
[D]. Loudness
Q6

Which of the following statement is or are incorrect?

[A]. Sound can travel through solids, liquids and gases.
[B]. The sound of ringing telephone bell travels to us through the air in the room.
[C]. Sound cannot travel through vacuum because vacuum has no molecules which can vibrate and carry sound waves.
[D]. None of the above.
Q7

Ultrasound has frequency of vibration:

[A]. Between 20 and 20,000 Hz
[B]. Below 20 Hz
[C]. Above 20,000 Hz
[D]. Between 500 and 10,000 Hz
Q8

Which of the following statements are correct?

[A]. Sound is produced by vibration and sound requires a medium for propagation.
[B]. Sound is produced by vibration and sound requires a medium for propagation and light and sound both requires a medium for propagation.
[C]. Sound requires a medium for propagation and light and sound both requires a medium for propagation and sound travel slower than light.
[D]. Sound is produced by vibration and sound requires a medium for propagation and sound travel slower than light.
Q9

An object is vibrating at 50 Hz. What is its time period?

[A]. 0.02 s
[B]. 2 s
[C]. 0.2 s
[D]. 20 s
Q10

A simple pendulum makes 10 oscillation in 20 seconds. What is the time period and frequency of its oscillations?

[A]. 0.5 Hz and 2 s respectively
[B]. 0.1 Hz and 0.5 s respectively
[C]. 0.2 Hz and 3 s respectively
[D]. 0.3 Hz and 4 s respectively
Q11

Lighting can be seen at the moment when it occurs. Paheli observes lighting in her area. She hears the sound 5 seconds after she observed lighting. How far is she from the place where lightning occurs?

[A]. 1.56 km
[B]. 1.65 km
[C]. 16.5 km
[D]. 15.6 km
Q12

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. The outer part of ear is called “pinna”.
[B]. The inner part of ear has a coiled tube called “cochlea”.
[C]. The three tiny bones in the ear act as a system of levers and sound vibration passing them on the brain.
[D]. None of the above.
Q13

Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?

[A]. Stretched strings
[B]. Stretched membranes
[C]. Metal plates
[D]. Air columns
Q14

Consider the following statements and choose the incorrect one:

[A]. Partial hearing loss can also be caused by noise pollution.
[B]. Partial hearing loss is generally due to an illness, infection, injury or old age.
[C]. Hearing Aid is a small sound amplifying device worn on the ear by any deaf person.
[D]. None of the above
Q15

Which of the following sound frequencies can be heard by a woman having a normal hearing range?

[A]. 25000 Hz and 15 kHz
[B]. 15 kHz and 40000 Hz
[C]. 15 kHz and 25 Hz
[D]. 25 Hz
Q16

Before playing the orchestra is in a musical concert a sitarist tries to adjust the tension and pluck the string suitably. By doing so he is adjusting:

[A]. Intensity of the sound only
[B]. Amplitude of the sound only
[C]. Frequency of the sitar string with the frequency of other musical instruments
[D]. Loudness of the sound
Q17

A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case:

[A]. Sound will be louder but pitch will not be different
[B]. Sound will be louder and the pitch will also be higher
[C]. Sound will be louder but pitch will be lower
[D]. Both loudness and pitch will remain unaffected
Q18

The speed of highly penetrating “ultrasonic waves” is:

[A]. Lower than those of audible sound waves
[B]. Higher than those of audible sound waves
[C]. Much higher than those of audible sound waves
[D]. Same as those of audible sound waves
Q19

Read the following sentences carefully, and choose the correct one:

[A]. Manjira is a plate type musical instrument.
[B]. Mridangam, table, dholak are the examples of membrane type musical instrument.
[C]. Bansuri, trumpet, shehnai are the examples of musical wind instrument.
[D]. All the above.
Q20

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. Ultrasound is used to study the growth of foetus inside the mother’s womb.
[B]. Ultrasound is used to measure the depth of sea or ocean and also used to locate underwater objects.
[C]. Ultrasound is used in the treatment of muscular pain and a disease called arthritis which is inflammation of joints.
[D]. None of the above.
Q21

We can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound called:

[A]. Frequency
[B]. Timbre
[C]. Pitch
[D]. Loudness
Q22

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. The sounds of frequencies less than 20 hertz are called infrasonic.
[B]. The range of audible frequency of sound for human hearing is from 20 hertz to 20000 Hertz.
[C]. The sound of frequencies greater than 20,000 hertz are called ultrasonics.
[D]. All the above.
Q23

The velocities of sound waves in four media M, N, O and P are 18, 000 km/h, 900 km/h, 0 km/h, and 1200 km/h respectively. Which medium could be a liquid substance?

[A]. M
[B]. N
[C]. O
[D]. P
Q24

Consider the following statements and choose the correct one:

[A]. The pitch of a sound depends on the frequency of vibration.
[B]. If the frequency of vibration is low, the sound produced has a low pitch.
[C]. If the frequency of vibration is high, the sound produced has a high pitch.
[D]. All the above.
Q25

The sound from a mosquito is produced when it vibrates its wings at the average rate of 500 vibration per second. What is the time period of the vibration?

[A]. 0.002 seconds
[B]. 0.02 seconds
[C]. 0.2 seconds
[D]. 2.0 seconds

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Last Edited: June 12, 2023