Check the below Online Education NCERT MCQ Questions for Class 8 Science Chapter 13 Sound with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. We have provided Sound Class 8 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-8-science-with-answers/

You can refer to NCERT Solutions for Class 8 Science Chapter 13 Sound to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

## Sound Class 8 MCQs Questions with Answers

Choose the correct option.

Sound Class 8 MCQ Question 1.
The voice box is also called as
(a) stomach
(b) heart
(c) larynx
(d) mouth

Sound MCQ Class 8 Question 2.
Sound is a kind of
(a) work
(b) energy
(c) force
(d) pressure

Class 8 Science Chapter 13 MCQ Question 3.
The hearing range of human ear is
(a) 20 Hz to 20,000 Hz
(b) less than 20 Hz
(c) more than 20,000 Hz
(d) 20 Hz to 25,000 Hz

Answer: (a) 20 Hz to 20,000 Hz

Class 8 Sound MCQ Question 4.
Pitch of sound is determined by its
(a) frequency
(b) speed
(c) amplitude
(d) loudness

MCQ On Sound Class 8 Question 5.
The frequency of subsonic sound is
(a) more than 20 Hz
(b) 100 Hz
(c) less than 20 Hz
(d) more than 20,000 Hz

Answer: (c) less than 20 Hz

MCQ Of Sound Class 8 Question 6.
Cochlea is a part of
(a) hearing organ
(b) sound producing organ
(c) muscular organ
(d) air pollution

Class 8 Science Sound MCQ Question 7.
1 hertz is equal to
(a) 1 vibration per minute
(b) 10 vibrations per minute
(c) 60 vibrations per minute
(d) 600 vibrations per minute

Answer: (c) 60 vibrations per minute

MCQ Questions For Class 8 Science Chapter 13 Question 8.
Sound cannot travel through
(a) air
(b) water
(c) air
(d) vacuum

Sound Chapter Class 8 MCQ Question 9.
The sound in the audible range is called
(a) ultrasonic sound
(b) sonic sound
(c) subonic sound
(d) light sound

Class 8 Science Ch 13 MCQ Question 10.
Speed is
(a) $$\frac{Distance travelled}{Time}$$
(b) $$\frac{Time}{Distance travelled}$$
(c) Distance travelled × Time
(d) Time + Distance travelled

Answer: (a) $$\frac{Distance travelled}{Time}$$

Ch 13 Science Class 8 MCQ Question 11.
A pendulum oscillates 20 times in 4 seconds. Find its time period.
(a) 0.05 sec.
(b) 0.001 sec.
(c) 0.2 sec.
(d) 0.1 sec

MCQ Sound Class 8 Question 12.
Loudness of sound is determined by
(a) pitch
(b) frequency
(c) amplitude
(d) time period

Class 8 Science Chapter Sound MCQ Question 13.
The number of vibrations made by a vibrating body in one second is
(a) frequency
(b) noise
(c) loudness
(d) pitch

MCQs On Sound Class 8 Question 14.
The maximum displacement of a body from its mean position is called
(a) amplitude
(b) oscillation
(c) periodic motion
(d) frequency

MCQ Questions On Sound Class 8 Question 15.
The velocity of sound at 20°C is approximately
(a) 3400 m/sec.
(b) 340 m/sec.
(c) 430 m/sec
(d) 304 m/sec.

Question 16.
Sound is produced by
(a) Non-Vibrating objects only
(b) Vibrating and non- vibrating objects
(c) Vibration has no relation to sound
(d) Vibrating objects only

Question 17.
Sound cannot travel through
(a) vacuum
(b) air
(c) water
(d) solids

Question 18.
Vibration is also known as
(a) Vibratory motion
(b) Translatory motion
(c) Oscillatory motion
(d)  None of these

Question 19.
Frequency is expressed in
(a) Kilometer
(b) Hertz
(c) gram

Question 20.
The number of oscillations per second is called
(a) Amplitude of oscillation
(b) Pitch of oscillation
(c) Frequency of oscillation
(d) None of the above

Question 21.
Above _____ dB the sound becomes physically painful
(a) 60
(b) 40
(c) 120
(d) 80

Question 22.
When the amplitude of vibration is large, sound produced is
(a)  No sound
(b) feeble
(c) loud
(d) No relation between amplitude and sound

Question 23.
Human can hear sound in the range of
(a) 200-2000 Hz
(b) 20-20,000 Hz
(c)  2-20000 Hz
(d) 2000-200000 Hz

Question 24.
An ultrasound equipment works at frequency
(a) Higher than 20,000 Hz
(b) Higher than 10,000 Hz
(c) Lower than 20,000 Hz
(d) Lower than 10,000 Hz

Answer: (a) Higher than 20,000 Hz

Question 25.
Voice of man is heavy compared to a woman because
(a) Female vocal cord is longer
(b) Male vocal cord is shorter
(c) Male vocal cord is longer
(d) The concept is not related

Answer: (c) Male vocal cord is longer

Match the items given in column I suitably with those given in column II.

 Column I Column II 1. Audible frequencies (a) 10 dB 2. Length of vocal cords in man (b) 30 dB 3. Ultrasound (c) 20 mm long 4. Normal breathing (d) 20 to 20,000 Hz 5. Soft whisper  (At 5 m) (e) Hertz 6. Frequency (f) Percussion instrument 7. Unpleasant sound (g) Music 8. Pitch (h) Produced by bats 9. Tabla (i) Noise 10. Pleasant sound (j) Higher frequency

 Column I Column II 1. Audible frequencies (d) 20 to 20,000 Hz 2. Length of vocal cords in man (c) 20 mm long 3. Ultrasound (h) Produced by bats 4. Normal breathing (a) 10 dB 5. Soft whisper  (At 5 m) (b) 30 dB 6. Frequency (e) Hertz 7. Unpleasant sound (i) Noise 8. Pitch (j) Higher frequency 9. Tabla (f) Percussion instrument 10. Pleasant sound (g) Music

Fill in the blanks with suitable word/s.

1. human beings sound is produced by __________.

2. Sound of frequency lower than 20 Hz is called the __________.

3. The __________ nerve is also present in the inner ear.

4. Sounds which are unpleasant to the ear is called __________.

5. Too much noise in our surroundings that causes discomfort is called __________.

6. The speed of sound is maximum in __________.

7. Sounds of frequencies higher than 20,000 Hz are called the __________ sound.

8. __________ is the time taken by a vibrating body for one complete vibration.

9. Above __________ the noise becomes physically painful.

10. Plantation on the roadside can reduce __________.

11. The hearing range of human ears is __________.

Answer: 20 Hz to 20,000 Hz

12. The loudness of normal breathing of human is __________.

13. Vibration is a repeated __________ and __________ motion.

14. The loudness of sound is determined by the __________ of vibration.

15. The human voice box is called __________.

State whether the given statements are true or false.

1. All human beings can hear sounds of frequencies upto 60,000 Hz.

2. The sound in a sitar is produced by plucking its strings.

3. Sound cannot travel through vacuum.

4. Sound does not need a medium for its propagation.

5. The loudness is expressed in a unit called decibel.

6. Loud sounds have high frequencies.

7. Sound travel faster in air, slower in iron.

8. Light travels much faster than sound.

9. Man cannot hear sound of bats.

10. The time taken to complete one oscillation is called frequency.

11. Shriller sound has more frequency.

12. Tabla is a musical instrument.

13. The sound could not travel in solid.