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Saturday, 31 October

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. 32O2(g)⇌O3(g)\frac{3}{2}\mathrm{O_{2(g)}} \rightleftharpoons \mathrm{O_{3(g)}}. Kp=2.47×10−29\mathrm{K_p} = 2.47\times10^{-29}. ΔrG∘\Delta_r G^{\circ} for the reaction is _________ kJ. (Given R = 8.314 J K−1^{-1} mol−1^{-1})

Official answer

163

NTA final key.

Same idea in other shifts

Asked 10× in all
  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. 1 Feb 2024, Shift 2 · Q82For a certain reaction at 300K, K = 10, then ΔG∘\Delta G^\circ for the same reaction is −- ________ ×10−1\times 10^{-1} kJ mol−1^{-1}. (Given…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
  6. 25 Jun 2022, Shift 1 · Q84The standard entropy change for the reaction 4Fe(s)+3O2(g)→2Fe2O3(s)4\mathrm{Fe(s)} + 3\mathrm{O_2(g)} \rightarrow 2\mathrm{Fe_2O_3(s)} is…EasyNumerical value
  7. 26 Jun 2022, Shift 2 · Q8640% of HI undergoes decompostion to H2\mathrm{H_2} and I2\mathrm{I_2} at 300 K. ΔG⊖\Delta G^\ominus for this decompostion reaction at one…MediumNumerical value
  8. 31 Aug 2021, Shift 2 · Q31The incorrect expression among the following is :MediumSingle correct

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.