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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 25 June 2022, Shift 1, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

The standard free energy change (ΔG∘\Delta \mathrm{G^\circ}) for 50% dissociation of N2O4\mathrm{N_2O_4} into NO2\mathrm{NO_2} at 27°C and 1 atm pressure is −x J mol−1-x\ \mathrm{J\ mol^{-1}}. The value of xx is __________. (Nearest Integer) [Given : R=8.31 J K−1 mol−1\mathrm{R} = 8.31\ \mathrm{J\ K^{-1}\ mol^{-1}}, log⁡1.33=0.1239\log 1.33 = 0.1239 ln⁡10=2.3\ln 10 = 2.3]

Official answer

710

NTA final key.

Chapter
Equilibrium
Topic
Chemical Equilibrium
Idea tested
Standard Gibbs Free Energy and Equilibrium Constant

Same idea in other shifts

Asked 3× in all
  1. 6 Apr 2026, Shift 2 · Q74In a closed flask at 600 K, one mole of X2Y4(g)\mathrm{X_2Y_4(g)} attains equilibrium as given below :…MediumNumerical value
  2. 18 Mar 2021, Shift 2 · Q53The gas phase reaction 2A(g)⇌A2(g)\mathrm{2A(g) \rightleftharpoons A_2(g)} at 400 K has ΔG∘=+25.2\Delta G^\circ = +25.2 kJ mol−1^{-1}. The equilibrium…MediumNumerical value

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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.