2. Solved Papers
  3. JEE Main & Advanced

JEE Main & Advanced JEE Main Paper (Held on 08-4-2019 Morning)

  • question_answer
    Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas? (Assume nonexpansion work is zero) [JEE Main 8-4-2019 Morning]

    A) Cyclic process : \[q=\,\text{w}\]

    B) Isothermal process :\[q=\,\text{w}\]

    C) Adiabatic process : \[\Delta U=\,\text{w}\]

    D) Isochoric process : \[\Delta U=q\]

    Correct Answer: C

    Solution :

    For cyclic process : \[\Delta U=0\Rightarrow q=-\,\text{w}\] For isothermal process : \[\Delta U=0\Rightarrow q=-\,\text{w}\] For adiabatic process : \[q=0\Rightarrow \Delta U=\text{W}\] For isochoric process : \[\text{w}=0\Rightarrow \Delta U=q\] Correct option : (c)


You need to login to perform this action.
You will be redirected in 3 sec spinner