JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 24 June 2022, Shift 1, Chemistry Q82

Question 82 of 90 in this shift, Chemistry question 22 of 30, Section B.

\mathrm{2O_3(g)\rightleftharpoons 3O_2(g)}

At 300 K, ozone is fifty percent dissociated. The standard free energy change at this temperature and 1 atm pressure is

(-)

______

\mathrm{J\ mol^{-1}}

. (Nearest integer) [Given :

\ln 1.35=0.3

and

R=8.3\ \mathrm{J\ K^{-1}\ mol^{-1}}

]

Official answer

747

NTA final key (2022 Session 1).

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
31 Jan 2024, Shift 1 · Q84Consider the following reaction at 298 K. $\frac{3}{2}\mathrm{O_{2(g)}} \rightleftharpoons \mathrm{O_{3(g)}}$ .…EasyNumerical 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

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.