Learn

Saturday, 31 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 10 April 2023, Shift 2, Chemistry Q85

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

A(g)⇌2B(g)+C(g)\mathrm{A}(g) \rightleftharpoons 2\mathrm{B}(g) + \mathrm{C}(g) For the given reaction, if the initial pressure is 450 mm Hg and the pressure at time t is 720 mm Hg at a constant temperature T and constant volume V. The fraction of A(g) decomposed under these conditions is x×10−1x \times 10^{-1}. The value of x is __________ (nearest integer)

Official answer

3

NTA final key.

Chapter
Equilibrium
Topic
Chemical Equilibrium
Idea tested
Dalton's Law in Kp Calculations

Same idea in other shifts

Asked 3× in all
  1. 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
  2. 2 Apr 2025, Shift 1 · Q73Consider the following equilibrium, CO(g)+2H2(g)⇌CH3OH(g)\mathrm{CO(g)+2H_2(g)\rightleftharpoons CH_3OH(g)} 0.1 mol of CO along with a catalyst is present in…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.