Class 8 Science Chapter 13 MCQ (Multiple Choice Questions) of Sound for CBSE and State board students prepared for new academic session 2023-2024 free to use. All the contents are prepared from latest NCERT Books issued for new academic session 2023-24. 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 13.

Class 8 Science Chapter 13 MCQ for 2023-2024

Class: 8Science
Chapter: 13Sound
Contents: MCQ Online Tests

MCQ Tests with Answers for Class 8 Science Chapter 13

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

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

[A]. Sound is a form of energy which makes us hear.
[B]. Sound is produced by vibrating objects.
[C]. Sound is produced by different objects but human cannot produce sound.
[D]. The vibration of the sound producing object are so small that we cannot see them easily.
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

1 hertz is equal to:

[A]. 1 vibration per minute
[B]. 10 vibrations per minute
[C]. 60 vibrationsper minute
[D]. 600 vibrations per minute
Q5

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.
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

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.
Q8

In which of these medium can sound travel?

[A]. Wood and Water
[B]. Wood and Water and Air
[C]. Air and Vacuum
[D]. Water and Air and Vacuum
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

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

[A]. [A] The speed of sound in air is 340 meters per second.
[B]. The speed of sound in water is 1500 meters per second.
[C]. Sound travels at a speed of 5000 metres per second through iron or steel.
[D]. None of the above.
Q13

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

[A]. [A] Sound travels about 15 times faster in steel than in air.
[B]. Sound travels faster in wood than in air.
[C]. Sound travels faster in wood than in water.
[D]. None of the above.
Q14

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
Q15

Choose the statements which are correct to measure to control noise pollution:

[A]. The bursting of crackers should be avoided
[B]. We should not play a television, radio, stereo-system too loudly.
[C]. The too loud horns of motor vehicles should not be blown unnecessarily.
[D]. All the above.
Q16

Choose the statements which are incorrect about noise pollution:

[A]. Loud noise can cause irritation and headache.
[B]. Loud noise can even damage the ears permanently and cause deafness.
[C]. Loud noise can cause an ailment called hypertension or high blood pressure.
[D]. Loud noise gives energy to all young persons including teenag
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

The ultrasound waves can penetrate into matter to a large extent because they have:

[A]. Very high speed
[B]. Very high frequency
[C]. Very high quality
[D]. Very high amplitude
Q21

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.
Q22

Which of the following modes is utilized in the production of sound by humans?

[A]. Vibrating membranes.
[B]. Vibrating plates.
[C]. Vibrating strings.
[D]. Vibrating air columns.
Q23

In a science quiz competition, Payel is asked a question where she had to choose the statement which was/were incorrect?

[A]. The voice of a woman is shriller than that of a man.
[B]. The voice of a small baby is even more shrill than that of a woman.
[C]. As the frequency of vibration of an object increases, the pitch or shrillness of sound produced by it also increases.
[D]. None of the above.
Q24

Which of the following statement is or are incorrect?

[A]. The number of vibrations made in one second is called the frequency of vibration.
[B]. When an object makes one vibration per second, its frequency is said to be 1 hertz.
[C]. The loudness of sound depends on the amplitude of vibrations of the vibrating object.
[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

Download App for Class 8

Suggestion and Feedback

Users suggestions help to improve the website and its contents. So, please provide the feedback or suggestion, if any, which help us to prepare new contents for the students.

Last Edited: January 27, 2022