JEE MAIN · PHYSICS · THERMODYNAMICS

JEE Main Thermodynamics Questions & Solutions

15 solved questions on Thermodynamics, ranging from easy to JEE-Advanced-flavour hard. Click any to see the full solution.

9Easy
6Medium
0Hard

All 15 questions

  1. Easy MCQ +4 / -1

    The work done by a gas in an isobaric expansion from $V_1$ to $V_2$ at pressure $P$ is:

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  2. Medium MCQ +4 / -1

    For an adiabatic process, $PV^{\gamma} = $ const. For a monatomic ideal gas, $\gamma$ equals:

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  3. Easy MCQ +4 / -1

    In an isothermal process for an ideal gas:

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  4. Medium MCQ +4 / -1

    According to the Stefan-Boltzmann law, the power radiated by a black body is proportional to:

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  5. Easy MCQ +4 / -1

    Most good thermal conductors are also:

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  6. Easy MCQ +4 / -1

    The three fundamental modes of heat transfer are:

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  7. Medium MCQ +4 / -1

    A Carnot engine has an efficiency of 40% with hot reservoir at 500 K. The temperature of the cold reservoir is:

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  8. Medium MCQ +4 / -1

    A Carnot engine operates between 400 K and 300 K. Its efficiency is:

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  9. Easy MCQ +4 / -1

    The maximum possible efficiency of a heat engine working between a hot reservoir at $T_1$ and a cold reservoir at $T_2$ is:

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  10. Easy TRUE_FALSE +2 / -1

    A heat engine that converts all absorbed heat into work without any waste violates the second law of thermodynamics.

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  11. Medium MCQ +4 / -1

    The change in entropy for a reversible isothermal expansion of $n$ moles of an ideal gas from volume $V_1$ to $V_2$ at temperature $T$ is:

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  12. Easy MCQ +4 / -1

    For any process in an isolated system, the entropy:

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  13. Medium INTEGER +4 / -1

    A gas absorbs 100 J of heat and does 40 J of work. The change in internal energy (in J) is:

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  14. Easy MCQ +4 / -1

    According to the first law of thermodynamics, if $Q$ is the heat added to a system and $W$ is the work done by the system, the change in internal energy is:

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  15. Easy MCQ +4 / -1

    The Zeroth law of thermodynamics leads to the definition of:

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