Thermodynamics

JEE Advanced · Chemistry · 45 past questions

1. Q1 2026 Paper 1

   An ideal gas (0.5 mol), initially at 2 bar pressure, is compressed at a constant temperature of 600 K in two…

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2. Q2 2026 Paper 1

   List-I contains various physical/chemical processes, and List-II contains combinations of changes in enthalpy…

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3. Q3 2025 Paper 1

   Considering ideal gas behavior, the expansion work done (in kJ) when 144 g of water is electrolyzed…

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4. Q4 2024 Paper 1

   Consider the following volume–temperature (V–T) diagram for the expansion of 5 moles of an ideal monoatomic… (with a figure)

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5. Q5 2023 Paper 1

   One mole of an ideal monoatomic gas undergoes two reversible processes (A $\to$ B and B $\to$ C) as shown in… (with a figure)

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6. Q6 2022 Paper 1

   2 mol of Hg($g$) is combusted in a fixed volume bomb calorimeter with excess of O$_2$ at 298 K and 1 atm into…

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7. Q7 2022 Paper 2

   The correct option(s) about entropy (S) is(are)…

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8. Q8 2021 Paper 1

   Question Stem for Question Nos. 7 and 8… (with a figure)

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9. Q9 2021 Paper 1

   Question Stem for Question Nos. 7 and 8… (with a figure)

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10. Q10 2021 Paper 1

    An ideal gas undergoes a reversible isothermal expansion from state I to state II followed by a reversible… (with a figure)

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11. Q11 2021 Paper 2

    One mole of an ideal gas at 900 K, undergoes two reversible processes, I followed by II, as shown below. If… (with a figure)

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12. Q12 2020 Paper 1

    In thermodynamics, the $P-V$ work done is given by…

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13. Q13 2020 Paper 1

    Consider the reaction $\mathbf{A} \rightleftharpoons \mathbf{B}$ at 1000 K. At time $t'$, the temperature of… (with a figure)

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14. Q14 2020 Paper 1

    Consider a 70% efficient hydrogen-oxygen fuel cell working under standard conditions at 1 bar and 298 K. Its…

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15. Q15 2020 Paper 2

    The 1$^{st}$, 2$^{nd}$, and the 3$^{rd}$ ionization enthalpies, $I_1$, $I_2$, and $I_3$, of four atoms with…

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16. Q16 2020 Paper 2

    Tin is obtained from cassiterite by reduction with coke. Use the data given below to determine the minimum…

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17. Q17 2019 Paper 1

    Choose the reaction(s) from the following options, for which the standard enthalpy of reaction is equal to…

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18. Q18 2018 Paper 2

    For a reaction, A ⇌ P, the plots of [A] and [P] with time at temperatures $T_1$ and $T_2$ are given below.… (with a figure)

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19. Q19 2018 Paper 2

    The surface of copper gets tarnished by the formation of copper oxide. N$_2$ gas was passed to prevent the…

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20. Q20 2018 Paper 2

    Consider an electrochemical cell: $\mathrm{A(s)\,|\,A^{n+}(aq,\,2\ M)\,||\,B^{2n+}(aq,\,1\ M)\,|\,B(s)}$. The…

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21. Q21 2017 Paper 1

    An ideal gas is expanded from $(p_1, V_1, T_1)$ to $(p_2, V_2, T_2)$ under different conditions. The correct…

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22. Q22 2017 Paper 2

    The standard state Gibbs free energies of formation of C(graphite) and C(diamond) at T = 298 K are…

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23. Q23 2016 Paper 1

    One mole of an ideal gas at 300 K in thermal contact with surroundings expands isothermally from 1.0 L to 2.0…

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24. Q24 2016 Paper 2

    PARAGRAPH 1…

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25. Q25 2015 Paper 1

    Match the thermodynamic processes given under Column I with the expressions given under Column II.

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26. Q26 2015 Paper 2

    When 100 mL of 1.0 M HCl was mixed with 100 mL of 1.0 M NaOH in an insulated beaker at constant pressure, a…

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27. Q27 2014 Paper 1

    An ideal gas in a thermally insulated vessel at internal pressure = $P_1$, volume = $V_1$ and absolute… (with a figure)

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28. Q28 2014 Paper 2

    For the process…

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29. Q29 2013 Paper 1

    The standard enthalpies of formation of $CO_2(g)$, $H_2O(l)$ and glucose($s$) at 25 °C are $-400\ kJ/mol$…

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30. Q30 2013 Paper 2

    A fixed mass 'm' of a gas is subjected to transformation of states from K to L to M to N and back to K as… (with a figure)

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31. Q31 2013 Paper 2

    A fixed mass 'm' of a gas is subjected to transformation of states from K to L to M to N and back to K as… (with a figure)

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32. Q32 2012 Paper 1

    For an ideal gas, consider only $P$-$V$ work in going from an initial state $X$ to the final state $Z$. The… (with a figure)

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33. Q33 2012 Paper 2

    Using the data provided, calculate the multiple bond energy (kJ mol$^{-1}$) of a C≡C bond in C$_2$H$_2$. That…

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34. Q34 2012 Paper 2

    The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure.… (with a figure)

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35. Q35 2011 Paper 2

    Match the transformations in column I with appropriate options in column II

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36. Q36 2010 Paper 1

    The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

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37. Q37 2010 Paper 1

    The bond energy (in kcal mol$^{-1}$) of a C–C single bond is approximately

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38. Q38 2010 Paper 1

    Among the following, the intensive property is (properties are)

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39. Q39 2010 Paper 2

    One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as… (with a figure)

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40. Q40 2009 Paper 2

    Among the following, the state function(s) is(are)

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41. Q41 2009 Paper 2

    In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess oxygen at 298.0…

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42. Q42 2008 Paper 1

    STATEMENT-1 : For every chemical reaction at equilibrium, standard Gibbs energy of reaction is zero.…

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43. Q43 2008 Paper 2

    STATEMENT-1: There is a natural asymmetry between converting work to heat and converting heat to work.…

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44. Q44 2007 Paper 1

    The value of $\log_{10}K$ for a reaction $A \rightleftharpoons B$ is (Given…

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45. Q45 2007 Paper 2

    For the process $H_2O(l)$ (1 bar, 373 K) $\rightarrow$ $H_2O(g)$ (1 bar, 373 K), the correct set of…

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