JEE Main 2026 · ChemistryNumerical answerNumerical valueMediumData or graph

JEE Main 5 April 2026, Shift 1, Chemistry Q74

Question 74 of 75 in this shift, Chemistry question 24 of 25, Section B.

The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been given below

\mathrm{A(g) \rightleftharpoons B(g) + C(g)}

$\frac{1}{T}$ (K $^{-1}$ )	$\log_{10}K_p$
0.05	3.5
0.06	2.5
0.07	1.5

The magnitude of

\frac{\Delta H^\circ}{R}

calculated from the above data is ________. (Nearest integer)

Official answer

230

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Chemical Equilibrium
Idea tested: Temperature Dependence of K (Van 't Hoff Equation)

Same topic in other shifts

All Chemical Equilibrium questions

4 Apr 2026, Shift 1 · Q55At T(K), the equilibrium constant of $\mathrm{A_2}(g)+\mathrm{B_2}(g)\rightleftharpoons \mathrm{C}(g)$ is $2.7\times10^{-5}$ . What is the…EasySingle correct
5 Apr 2026, Shift 2 · Q56The reaction $\mathrm{A(g)\rightleftharpoons B(g)+C(g)}$ was initiated with the amount 'a' of A(g). At equilibrium it is found that the…MediumSingle correct
6 Apr 2026, Shift 1 · Q57One mole each of He and A(g) are taken in a 10 L closed flask and heated to 400 K to establish the following equilibrium.…MediumSingle correct
6 Apr 2026, Shift 2 · Q74In a closed flask at 600 K, one mole of $\mathrm{X_2Y_4(g)}$ attains equilibrium as given below :…MediumNumerical value
8 Apr 2026, Shift 2 · Q55Consider the following reactions in which all the reactants and products are present in gaseous state $2\,xy \rightleftharpoons x_2 + y_2$ …MediumSingle correct
8 Apr 2026, Shift 2 · Q75Solid carbon, CaO and $\mathrm{CaCO_3}$ are mixed and allowed to attain equilibrium at T K.…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.