Statement 1: Loudness is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound.
Statement 2: Echo is always produced when sound is incident on the hard and polished surface.

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

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Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

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Statement 1 is true but statement 2 is false

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Statement 1 is false but statement 2 is true

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Solution

The correct option is B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
Loudness is the measure of the Amplitude of sound which distinguishes two sounds having different Amplitudes

Echo, on the other hand, is a reflection phenomenon that takes place when sound Is reflected from a hard and polished surface. Loose surfaces absorb most of the sound incident on them hence no echo occurs.

Both of the statements are correct but statement 2 is not the correct explanation of statement 1.

So, B is the correct answer.

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Statement 1: Loudness is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound.Statement 2: Echo is always produced when sound is incident on the hard and polished surface.

Statement 1: Loudness is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound.
Statement 2: Echo is always produced when sound is incident on the hard and polished surface.