JEE Main & Advanced Physics Thermodynamical Processes Question Bank Assertion and Reason

  • question_answer
    Assertion             :       An adiabatic process is an isoentropic process. Reason                 :       Change in entropy is zero in case of adiabatic process.

    A)             If both assertion and reason are true and the reason is the correct explanation of the assertion.

    B)             If both assertion and reason are true but reason is not the correct explanation of the assertion.

    C)             If assertion is true but reason is false.

    D)             If the assertion and reason both are false.

    E)             If assertion is false but reason is true.

    Correct Answer: A

    Solution :

                Change in entropy, \[\Delta S=\frac{\Delta Q}{T}\]. In an adiabatic change, heat transfer \[\Delta Q=0\]. \ \[\Delta S=0\], or \[S=\]constant i.e., entropy remains constant in an adiabatic process, or an adiabatic process is an isoentropic process.


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