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Friday, 9 October

JEE Main Chemistry · Thermodynamics (Chemistry)

Gibbs Energy and Equil

Gibbs Energy and Equil (Thermodynamics (Chemistry)) was asked 5 times in 5 JEE Main shifts, 2022–2026, out of the 42 shifts Lumi analysed. 5 of the 5 had a numerical answer.

Times asked
5
in 5 shifts
Years
2022–2026
Usual format
Numerical value
Calculation
Pattern
Frequent
repeats across shifts

How it is asked

  • Standard free energy from dissociation
  • Entropy change from enthalpy and k

Difficulty

Easy 1Medium 3Hard 1

Where it sits

Chapter: Thermodynamics (Chemistry). Topic: Gibbs Free Energy, 16 questions over 12 ideas.

Every time it came

All 5 questions

Newest first, each with its options and official answer.

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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