Question

Phenomenon of propagation of sound in air is similar to process
(A) Isobaric process
(B) Adiabatic process
(C) Isothermal process
(D) None of these

Answer 1

Hint Sound is product due to vibration of some objects. Sound can travel through gas, liquid or solid medium. When an object starts vibrating, it vibrates the particle of the medium around it. Sound travels in medium by vibrating particles of medium about their mean position. Medium particles never move from one place to another place and only vibration travels through the medium.

Complete step by step solution
Sound travels through some medium due to vibration produced to the source of sound. Every vibrating particle vibrates its neighbour particles and so on, due to sound travel from source of sound to listener. Sound travels in the form of a sound wave which moves through the medium from one particle to another particle. The particles don’t move forward, only the disturbance is forwarded from one particle to another.
In an isobaric process, the pressure of the system remains the same but sound propagates in the form of waves due to which pressure is changing with time. Then sound propagation is not an isobaric process.
In an isothermal process, the thermal energy remains the same but due to vibration of particles heat is generated. Then sound propagation is not an isothermal process.
In adiabatic processes, transfer of energy is only in the form of work and during sound propagation disturbance occurs due to work done by the source of sound. Then sound propagation is an adiabatic process.

Hence, correct answer is option B.

Note Source of sound vibrates the medium particles and these particles vibrate their neighbour particle and these chains of transfer disturbance (vibration) from one particle to another particle forms sound waves.