# Sound MCQ Questions Class 9 Science Chapter 12

Sound MCQ Questions Class 9 Science Chapter 12

NCERT MCQ Questions for Class 9 Science Chapter 12 Sound. Sound MCQ Questions with Answers from Class 9 Science.

## Sound MCQ Questions Class 9 Science Chapter 12

Sound Multiple Choice Questions with Answers Class 9 Science Chapter 12 PDF is available.

1.) Sound can be transferred through

a) Solid

b) Liquid

c) Gases

d) All of these

2.) The SI unit of frequency is —

a) Hertz

b) Per second

c) Meter/ second

d) Both a) and b)

Answer: d) Both a) and b)

3.) Loudness or softness of a sound is depend on

a) Amplitude

b) Frequency

c) Type of a wave

d) None of these

4.) Amplitude of the wave is depend on

a) Nature of wave

b) Force with which an object is made tovibrate

c) Displacement of the sound wave

d) Frequency of a wave

5.) The speed of sound is greater in

a) Nickel

b) Ethanol

c) Air

d) Sulphur dioxide

In case you are missed :- Previous Chapter MCQ Questions

6.) Horns of the vehicles are based on the principle of

a) Echo

b) Multiple reflections of sound

c) Ultrasound waves

d) None of these

Answer: b) Multiple reflections of sound

7.) Children under age of 5 years can hear sound upto

a) 10 kHz

b) 20 2Hz

c) 25 kHz

d) 30 kHz

8.) Rhinoceroses communicate using

a) Ultrasound waves

b) Infrasound waves

c) Audible sound waves

d) All of the above

9.) The frequency of ultrasound waves is

a) Less than audible sound waves

b) Greater than audible sound waves

c) Equal to or less than sound waves

d) None of these

Answer: b) Greater than audible sound waves

10) If the pendulum oscillate 78 times in one minute then the frequency of that pendulum will be—

a) 2 Hz

b) 1.5 Hz

c) 1.3 Hz

d) 1.2 Hz

Given, Number of oscillations = n = 78,

Time = 1 minute = 60 seconds

As we know that,

Frequency = No of oscillations/time

Frequency = 78/60

Frequency = 1.3 Hz

In case you are missed :- Next Chapter MCQ Questions

Updated: April 11, 2023 — 4:24 pm