Class 8 Science Chapter 13 MCQ

Class 8 Science Chapter 13 MCQ (Multiple Choice Questions) of Sound for CBSE and State board students prepared for new academic session 2021-2022 free to use. All the contents are prepared from latest NCERT Books issued for new academic session 2021-22.

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 2021-2022

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

MCQ Tests with Answers for Class 8 Science Chapter 13




Q1

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.
Q2

Loudness of sound is measured in units of

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

Consider the following statements and choose the correct one:

[A]. Sound is produced by the vibration of vocal cords.
[B]. The human voice box or larynx contain two ligaments known as “vocal cords”.
[C]. The human beings produce sound by using the voice box which is called larynx.
[D]. All the above.
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

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

The loudness of sound depends on:

[A]. Its amplitude
[B]. Its time period
[C]. Its frequency
[D]. Its speed
Q10

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



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

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

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
Q18

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.
Q19

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
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

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.
Q22

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
Q23

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.
Q24

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.
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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