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Friday, 9 October

JEE Main Chemistry · Thermodynamics (Chemistry)

Gibbs Free Energy in JEE Main

Gibbs Free Energy (Chemistry, Thermodynamics (Chemistry)) came 16 times in 15 of the 42 JEE Main shifts Lumi analysed, across 12 distinct ideas. 11 of them came in 2024–26; it was last asked in 2026.

Questions
16
in 15 shifts
Ideas asked
12
1 asked more than once
Numerical answer
11
69% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0360’170’201’211’223’234’242’255’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 4Medium 8Hard 4

Format

  • Numerical value11 Q
  • Single correct2 Q
  • Diagram based2 Q
  • Two statements1 Q
Ideas inside the topic
12 ideas
Where it sits

Part of Thermodynamics (Chemistry), which had 51 questions in all. Gibbs Free Energy accounts for 31% of them. In Lumi's JEE taxonomy it belongs to Physical Chemistry.

Some questions sit in other chapters too: Electrochemistry, General Principles and Processes of Isolation of Elements.

Every question

All 16 Gibbs Free Energy questions

Newest first, each with its options and official answer.

  1. 2 Apr 2026, Shift 1 · Q75At the transition temperature TT, A⇌B\mathrm{A\rightleftharpoons B} and ΔG0=105−35log⁡T\Delta G^0=105-35\log T where A and B are two states of…MediumNumerical value
  2. 2 Apr 2026, Shift 2 · Q73Consider the following two half-cell reactions along with the standard reduction potential given:…HardNumerical value
  3. 4 Apr 2026, Shift 2 · Q72For the following reaction at 50 ∘^\circC and at 2 atm pressure, 2N2O5(g)⇌2N2O4(g)+O2(g)\mathrm{2N_2O_5(g)\rightleftharpoons2N_2O_4(g)+O_2(g)}…HardNumerical value
  4. 5 Apr 2026, Shift 2 · Q54Consider the following data for the reaction X2(g)+Y2(g)⇌2XY(g)\mathrm{X_2(g)+Y_2(g)\rightleftharpoons 2XY(g)} at 600 K. The ΔrG⊖\Delta_r G^\ominus (in kJ…MediumSingle correct
  5. 6 Apr 2026, Shift 1 · Q75Consider the reaction X⇌Y\mathrm{X\rightleftharpoons Y} at 300 K. If ΔHθ\Delta H^\theta and K are 28.40 kJ mol−1^{-1} and 1.8×10−71.8\times10^{-7}…MediumNumerical value
  6. 2 Apr 2025, Shift 2 · Q54Which of the following graphs correctly represents the variation of thermodynamic properties of Haber's process ?HardDiagram basedHas a figure
  7. 3 Apr 2025, Shift 1 · Q53Which of the following properties will change when system containing solution 1 will become solution 2? Solution 1: 10 mol of solute x +…MediumDiagram basedHas a figure
  8. 6 Apr 2024, Shift 2 · Q83For the reaction at 298 K, 2A+B→C2A + B \rightarrow C, ΔH=400\Delta H = 400 kJ mol−1^{-1} and ΔS=0.2\Delta S = 0.2 kJ mol−1^{-1} K−1^{-1}. The…EasyNumerical value
  9. 9 Apr 2024, Shift 2 · Q83When ΔHvap=30\Delta H_{vap} = 30 kJ/mol and ΔSvap=75 J mol−1K−1\Delta S_{vap} = 75\ \mathrm{J\,mol^{-1}K^{-1}}, then the temperature of vapour, at one atmosphere…EasyNumerical value
  10. 29 Jan 2024, Shift 1 · Q62Which of the following is not correct?EasySingle correct
  11. 31 Jan 2024, Shift 1 · Q84Consider the following reaction at 298 K. 32O2(g)⇌O3(g)\frac{3}{2}\mathrm{O_{2(g)}} \rightleftharpoons \mathrm{O_{3(g)}}.…EasyNumerical value
  12. 6 Apr 2023, Shift 1 · Q84The value of log K for the reaction A⇌B\mathrm{A \rightleftharpoons B} at 298 K is ________. (Nearest integer) Given:…MediumNumerical value
  13. 6 Apr 2023, Shift 1 · Q86Consider the graph of Gibbs free energy G vs Extent of reaction. The number of statement/s from the following which are true with respect…MediumNumerical valueHas a figure
  14. 13 Apr 2023, Shift 2 · Q65Given below are two statements related to Ellingham diagram: Statement I : Ellingham diagrams can be constructed for formation of oxides,…MediumTwo statements
  15. 24 Jun 2022, Shift 1 · Q822O3(g)⇌3O2(g)\mathrm{2O_3(g)\rightleftharpoons 3O_2(g)} At 300 K, ozone is fifty percent dissociated. The standard free energy change at this…MediumNumerical value
  16. 18 Mar 2021, Shift 1 · Q56For the reaction 2Fe3+(aq)+2I−(aq)→2Fe2+(aq)+I2(s)\mathrm{2Fe^{3+}(aq) + 2I^-(aq) \rightarrow 2Fe^{2+}(aq) + I_2(s)} the magnitude of the standard molar free energy…HardNumerical value