JEE Main 2024 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 31 January 2024, Shift 1, Chemistry Q84

Question 84 of 90 in this shift, Chemistry question 24 of 30, Section B.

Consider the following reaction at 298 K.

\frac{3}{2}\mathrm{O_{2(g)}} \rightleftharpoons \mathrm{O_{3(g)}}

\mathrm{K_p} = 2.47\times10^{-29}

\Delta_r G^{\circ}

for the reaction is _________ kJ. (Given R = 8.314 J K

^{-1}

mol

^{-1}

)

Official answer

163

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Gibbs Free Energy
Idea tested: Gibbs Energy and Equil

Same idea in other shifts

Asked 5× in all

4 Apr 2026, Shift 2 · Q72For the following reaction at 50 $^\circ$ C and at 2 atm pressure, $\mathrm{2N_2O_5(g)\rightleftharpoons2N_2O_4(g)+O_2(g)}$ …HardNumerical value
6 Apr 2026, Shift 1 · Q75Consider the reaction $\mathrm{X\rightleftharpoons Y}$ at 300 K. If $\Delta H^\theta$ and K are 28.40 kJ mol $^{-1}$ and $1.8\times10^{-7}$ …MediumNumerical value
6 Apr 2023, Shift 1 · Q84The value of log K for the reaction $\mathrm{A \rightleftharpoons B}$ at 298 K is ________. (Nearest integer) Given:…MediumNumerical value
24 Jun 2022, Shift 1 · Q82 $\mathrm{2O_3(g)\rightleftharpoons 3O_2(g)}$ At 300 K, ozone is fifty percent dissociated. The standard free energy change at this…MediumNumerical value

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 42 of the 174 JEE Main shifts held from 2017 to 2026.