Compression and Rarefaction

Q. Sound waves in air are always longitudinal because

1. Air can be compressed or rarefied
2. Air is a mixture of several gases
3. Air have no rigidity
4. Air exerts pressure

Q. Consider the following statements about sound passing through a gas
$\left(A\right)$ The pressure of the gas at a point oscillates with time
$\left(B\right)$ The position of a small layer of gas oscillates with time

1. Both $\left(A\right)$ and $\left(B\right)$ are correct
2. $\left(A\right)$ is correct but $\left(B\right)$ is wrong
3. $\left(B\right)$ is correct but $\left(A\right)$ is wrong
4. Both $\left(A\right)$ and $\left(B\right)$ are wrong

Q.

Choose the Most appropriate answer.
In a tube when a sound wave is created, compression and rarefaction pulses are produced. The rarefaction pulse has pressure.

1. 0

2. Negative

3. Minimum

4. Minimum but greater than 0

Q. The low pressure regions which are created when sound travels through a medium are known as?

1. Compression
2. Crest
3. Rarefaction
4. Trough

Q. Consider the following statements about sound passing through a gas
$\left(A\right)$ The pressure of the gas at a point oscillates with time
$\left(B\right)$ The position of a small layer of gas oscillates with time

1. Both $\left(A\right)$ and $\left(B\right)$ are correct
2. $\left(A\right)$ is correct but $\left(B\right)$ is wrong
3. $\left(B\right)$ is correct but $\left(A\right)$ is wrong
4. Both $\left(A\right)$ and $\left(B\right)$ are wrong

Q. The thermodynamic process involved in the propagation of sound wave in gaseous medium is

1. Adiabatic
2. Isothermal
3. Isobaric
4. Isochoric