JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 11 April 2023, Shift 2, Chemistry Q85

Question 85 of 90 in this shift, Chemistry question 25 of 30, Section B.

4.5 moles each of hydrogen and iodine is heated in a sealed ten litre vessel. At equilibrium, 3 moles of HI were found. The equilibrium constant for

\mathrm{H_2(g) + I_2(g) \rightleftharpoons 2HI\ (g)}

is ____________

Official answer

NTA final key.

Chapter: Equilibrium
Topic: Chemical Equilibrium
Idea tested: ICE Table Construction

Same idea in other shifts

Asked 4× in all

27 Jun 2022, Shift 1 · Q84 $\mathrm{2NOCl(g) \rightleftharpoons 2NO(g) + Cl_2(g)}$ In an experiment, 2.0 moles of NOCl was placed in a one-litre flask and the…MediumNumerical value
26 Aug 2021, Shift 2 · Q55The equilibrium constant $\mathrm{K_c}$ at 298 K for the reaction $\mathrm{A + B \rightleftharpoons C + D}$ is 100. Starting with an…MediumNumerical value
25 Jul 2021, Shift 1 · Q57For the reaction $\mathrm{A+B\rightleftharpoons 2C}$ the value of equilibrium constant is 100 at 298 K. If the initial concentration of…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.