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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceDiagram basedHardData or graph

JEE Main 2 April 2025, Shift 2, Chemistry Q54

Question 54 of 75 in this shift, Chemistry question 4 of 25, Section A.

Which of the following graphs correctly represents the variation of thermodynamic properties of Haber's process ?

The figure, in words

Four graphs of thermodynamic quantities versus T/K, given as options.
  1. (1)[figure: plot vs T/K with y ticks 300 to -200; curves labelled −ΔGRθ/T-\Delta G_R^\theta/T (top, about 300 falling to about 200), −ΔHRθ/T-\Delta H_R^\theta/T (from about 100 falling through 0 to negative), ΔHRθ\Delta H_R^\theta (about -100, flat), ΔSRθ\Delta S_R^\theta (about -200, flat)]
  2. (2)[figure: plot vs T/K with y ticks 300 to -200; curves labelled −ΔHRθ/T-\Delta H_R^\theta/T (top, from about 300 falling to about 150), −ΔGRθ/T-\Delta G_R^\theta/T (from about 100 falling through 0 to negative), ΔHRθ\Delta H_R^\theta (about -100, flat), ΔSRθ\Delta S_R^\theta (about -200, flat)]Official answer
  3. (3)[figure: plot vs T/K with y ticks 200 to -200; curves labelled −ΔHRθ-\Delta H_R^\theta (top, from about 200 falling to about 100), −ΔGRθ/T-\Delta G_R^\theta/T (from about 100 falling through 0 to negative), ΔHRθ/T\Delta H_R^\theta/T (about -100, flat), ΔSRθ/T\Delta S_R^\theta/T (about -200, flat)]
  4. (4)[figure: plot vs T/K with y ticks 200 to -300; curves labelled ΔSRθ\Delta S_R^\theta (top, from about 200 falling to 100), ΔHRθ\Delta H_R^\theta (about 100, flat), −ΔGRθ/T-\Delta G_R^\theta/T (rising from about -150 to 0), −ΔHRθ/T-\Delta H_R^\theta/T (rising from about -300 to about 100)]

Official answer

Option 2

NTA final key.

Chapter
Thermodynamics (Chemistry)
Topic
Gibbs Free Energy
Idea tested
Gibbs Energy vs Temperature Graph

Same topic in other shifts

All Gibbs Free Energy questions
  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. 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

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.