Updated by Rakesh
on January 27, 2022, 9:58 AM
on January 27, 2022, 9:58 AM
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: 8 | Science |
| Chapter: 13 | Sound |
| 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
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Last Edited: January 27, 2022
