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

  • question_answer
    Assertion             :       In an adiabatic process, change in internal energy of a gas is equal to work done on or by the gas in the process. Reason                 :       Temperature of gas remains constant in a 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: C

    Solution :

               In an adiabatic process, no exchange of heat is permissible i.e., \[\Delta Q=0\]. As, \[\Delta Q=\Delta U+\Delta W=0\] Þ \[\Delta U=-\,\Delta W\]. Also in adiabatic process, temperature of gas changes.


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