Chapter 11: Sound Assertion-Reason Questions | science Class 9 CBSE

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Chapter 11: Sound Assertion-Reason Questions | science Class 9 CBSE | ByteNotes.in

Assertion-Reason

Check the statement and reason

A-R

Question 1

Logic Check

Assertion (A): Sound is produced due to the vibration of objects. Reason (R): Vibration is a kind of to-and-fro motion of an object.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 2

Logic Check

Assertion (A): A sound wave requires a medium to propagate. Reason (R): Sound waves are mechanical waves.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 3

Logic Check

Assertion (A): Sound cannot travel in vacuum. Reason (R): Particles of the medium are necessary for the propagation of sound.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 4

Logic Check

Assertion (A): Compressions are regions of high pressure. Reason (R): In compressions, particles are closer together than in rarefactions.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 5

Logic Check

Assertion (A): Sound waves are longitudinal in nature. Reason (R): In longitudinal waves, the particle displacement is parallel to the direction of wave propagation.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 6

Logic Check

Assertion (A): The loudness of sound depends on its amplitude. Reason (R): Greater amplitude corresponds to louder sound.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 7

Logic Check

Assertion (A): Pitch of a sound is determined by its frequency. Reason (R): Higher frequency corresponds to higher pitch.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 8

Logic Check

Assertion (A): The speed of sound in solids is greater than in gases. Reason (R): The particles in solids are more closely packed than in gases.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 9

Logic Check

Assertion (A): Sound travels faster in warm air than in cold air. Reason (R): The speed of sound increases with the temperature of the medium.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 10

Logic Check

Assertion (A): Frequency of a sound wave determines the quality of the sound. Reason (R): Quality of sound helps to distinguish between different sources producing the same pitch and loudness.

Reasoning Options

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Chapter sections

Chapter 11: Sound | Assertion-Reason

Assertion (A): Sound is produced due to the vibration of objects. Reason (R): Vibration is a kind of to-and-fro motion of an object.

Assertion (A): A sound wave requires a medium to propagate. Reason (R): Sound waves are mechanical waves.

Assertion (A): Sound cannot travel in vacuum. Reason (R): Particles of the medium are necessary for the propagation of sound.

Assertion (A): Compressions are regions of high pressure. Reason (R): In compressions, particles are closer together than in rarefactions.

Assertion (A): Sound waves are longitudinal in nature. Reason (R): In longitudinal waves, the particle displacement is parallel to the direction of wave propagation.

Assertion (A): The loudness of sound depends on its amplitude. Reason (R): Greater amplitude corresponds to louder sound.

Assertion (A): Pitch of a sound is determined by its frequency. Reason (R): Higher frequency corresponds to higher pitch.

Assertion (A): The speed of sound in solids is greater than in gases. Reason (R): The particles in solids are more closely packed than in gases.

Assertion (A): Sound travels faster in warm air than in cold air. Reason (R): The speed of sound increases with the temperature of the medium.

Assertion (A): Frequency of a sound wave determines the quality of the sound. Reason (R): Quality of sound helps to distinguish between different sources producing the same pitch and loudness.

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