Class 9 Science MCQ Chapter 12 Sound

CBSE Class 9 Science Chapter 12 Sound MCQs with answers are prepared as per the latest CBSE syllabus. These multiple-choice questions are highly important for Class 9 Science exams, as the topic of Sound forms a key part of the curriculum.

Practicing these MCQs helps students assess their understanding, strengthen concepts, and prepare effectively for exams in a structured way.

For more detailed study support, students can also explore:

• NCERT Solutions for Class 9 Science
• CBSE Class 9 Science Syllabus
• CBSE Class 9 MCQs

These resources together provide a comprehensive understanding of the chapter.

Class 9 science MCQ chapter 12 with answers

Class 9 Science students can utilize the provided set of multiple-choice questions with answers for Chapter 12, Sound. These MCQs are designed to help students prepare effectively for their CBSEexams, enabling them to achieve commendable scores. Students can also take the Class 9 Science MCQ Chapter 12 online test to practice in an exam-like format and strengthen their understanding.

Chapter 12 Sound MCQ Questions Class 9 Science with Answers (Easy Level)

Here are ten multiple-choice questions on sound for Class 9 Science along with their answers:

Q1. Which of the following is a longitudinal wave?

a) Water wave

b) Light wave

c) Sound wave

d) Radio wave

Answer: c) Sound wave

Q2. The frequency of a sound wave determines its:

a) Loudness

b) Speed

c) Wavelength

d) Pitch

Answer: d) Pitch

Q3. The speed of sound is maximum in:

a) Air

b) Water

c) Steel

d) Vacuum

Answer: c) Steel

Q4. Which part of the ear amplifies sound vibrations?

a) Cochlea

b) Eardrum

c) Ear canal

d) Ear ossicles

Answer: d) Ear ossicles

Q5. The phenomenon of persistence of sound after the source has stopped is called:

a) Reverberation

b) Echo

c) Resonance

d) Reflection

Answer: a) Reverberation

Q6.The minimum distance from a sound-reflecting surface required to hear an echo is:

a) 10 meters

b) 17 meters

c) 20 meters

d) 34 meters

Answer: b) 17 meters

Q7. The SI unit of sound intensity is:

a) Decibel

b) Hertz

c) Pascal

d) Watt per square meter

Answer: d) Watt per square meter

Q8. Sound cannot travel through:

a) Solids

b) Liquids

c) Gases

d) Vacuum

Answer: d) Vacuum

Q9. Which of the following animals does not use echolocation?

a) Bat

b) Dolphin

c) Whale

d) Ostrich

Answer: d) Ostrich

Q10. The phenomenon of bending of sound waves around obstacles is called:

a) Refraction

b) Diffraction

c) Interference

d) Polarization

Answer: b) Diffraction

MCQ Questions for Class 9 Science

• Matter in Our Surroundings
• Is Matter Around Us Pure
• Atoms and Molecules
• The Fundamental Unit of Life
• Tissues
• Motion

Class 9 Science MCQ Chapter 12 Sound (Moderate Level)

Q1. A sound wave with a frequency of 2000 Hz and a wavelength of 0.35 meters, what is the speed of the sound wave?

(a) 700 m/s

(b) 70 m/s

(c) 7 m/s

(d) 0.7 m/s

Answer: (a) 700 m/s.

Q2. At 0°C, the speed of sound in air is –

(a) 330 m/s

(b) 331 m/s

(c) 334 m/s

(d) 344 m/s

Answer: (b) 331 m/s

Q3. At 22°C, the speed of sound in air is

(a) 330 m/s

(b) 331 m/s

(c) 334 m/s

(d) 344 m/s

Answer: (d) 344 m/s

Q4. At 25°C, the speed of sound in water is –

(a) 4700 m/s

(b) 3980 m/s

(c) 1531 m/s

(d) 1498 m/s

Answer: (c) 1531 m/s

Q5. The sensation of sound persists in our brain for about-

(a) 0.1 second

(b) 0.2 second

(c) 0.3 second

(d) 0.4 second

Answer: (a) 0.1 second.

Q6. The minimum distance for hearing distinct echoes from the source is –

(a) 17.0 m

(b) 17.2 m

(c) 17.3 m

(d) 17.4 m

Answer: (b) 17.2 m.

Q7. The audible range of sound for human beings extends from about

(a) 10Hz to 2000Hz

(b) 20Hz to 20000Hz

(c) 10Hz to 2000Hz

(d) 20Hz to 2000Hz

Ans: (b) 20Hz to 20000Hz

Q8. Which of the following is correct?

(a) 1Hz=4cycle/s

(b) 1Hz=3cycles

(c) 1Hz=2cycle/s

(d) 1Hz=1cycle/s

Ans: (d) 1Hz=1cycle/s.

Q9. Which of the following animals can hear a sound of the frequency up to 25000Hz?

(a) above 18 years old man

(b) above 14 years old

(c) above the age of 7 years old children

(d) under the age of 5 years children

Ans: (d) under the age of 5 years children.

More resources for class 9

• NCERT Solutions for Class 9 Maths
• NCERT Solutions for Class 9 English
• NCERT Solutions for Class 9 Social Science

Q10. Rhinoceroses communicate using infrasound of frequency as low as –

(a) 7Hz

(b) 6Hz

(c) 5Hz

(d) 4Hz

Ans: (c) 5Hz.

Sound Class 9 MCQ with Answers (High Level)

Q1. Which of the following can hear high-frequency squeaks of the bat?

(a) rat

(b) ant

(c) moth

(d) lizard

Ans: (c) moth

Q2. Infrasound can be produced by –

(a) whales

(b) dolphins

(c) bats

(d) porpoise

Ans: (a) whales.

Q3. Which of the following animals play games by producing ultrasound?

(a) dolphin

(b) elephant

(c) bats

(d) rats

Ans: (d) rats.

Q4. Which of the following properties of a medium does not affect the speed of sound waves passing through it?

(a) Density of the medium

(b) Temperature of the medium

(c) Pressure of the medium

(d) Humidity of the medium

Answer: (c) Pressure of the medium

Q5. What is the phenomenon responsible for the bending of sound waves around obstacles?

(a) Diffraction

(b) Refraction

(c) Reflection

(d) Interference

Answer: (a) Diffraction

Q6. Which of the following statements is true regarding the frequency of sound waves?

(a) Frequency determines the loudness of sound.

(b) Frequency is inversely proportional to wavelength.

(c) Frequency is measured in decibels (dB).

(d) Frequency affects the pitch of sound.

Answer: (d) Frequency affects the pitch of sound.

Q7. How does the loudness of sound perceived by a person change with an increase in distance from the source?

(a) It increases

(b) It decreases

(c) It remains constant

(d) It fluctuates

Answer: (b) It decreases

Q8. Which of the following materials is the best conductor of sound waves?

(a) Air

(b) Water

(c) Steel

(d) Wood

Answer: (c) Steel

Q9. The speed of sound in a gaseous medium depends primarily on:

(a) Pressure and humidity

(b) Temperature and pressure

(c) Density and humidity

(d) Temperature and humidity

Answer: (b) Temperature and pressure

Q10. What is the unit of measurement for the intensity of sound waves?

(a) Decibels (dB)

(b) Hertz (Hz)

(c) Meters per second (m/s)

(d) Newtons (N)

Answer: (a) Decibels (dB)