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Saturday, 31 October

JEE Main · Chemistry · Chemical Kinetics

Gas Kinetics with Complex Stoichiometry

JEE Main asked Gas Kinetics with Complex Stoichiometry 6 times in 6 of the 108 shifts Lumi analysed, in 2021, 2023, 2024, 2025 and 2026. It belongs to Integrated Rate Equations, in Chemical Kinetics (Chemistry). The longest wait between two years asking it was 2 years. In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
5 of 8
First asked
2021
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2023, 2024, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.03’210’220.07’230.09’240.13’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 2 in 18 shifts · 2025: 1 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20251 of 8
  • 20242 of 18
  • 20231 of 12
  • 20220 of 24
  • 20211 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: multi-step.

  • Partial pressure from total pressure data
  • Identify incorrect option from pressure data

Difficulty

Easy 0Medium 5Hard 1

4 of the 6 questions had a numerical answer.

Every question

All 6 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 2 Apr 2026, Shift 2 · Q72Consider the following gas phase reaction being carried out in a closed vessel at 25°C. 2A(g)⟶4B(g)+C(g)2A(g) \longrightarrow 4B(g) + C(g) | time (min)…MediumNumerical value
  2. 7 Apr 2025, Shift 1 · Q56Reaction A(g)→2B(g)+C(g)\mathrm{A(g) \rightarrow 2B(g) + C(g)} is a first order reaction. It was started with pure A t/min | Pressure of system at time…MediumOtherHas a figure
  3. 31 Jan 2024, Shift 1 · Q65Integrated rate law equation for a first order gas phase reaction is given by (where Pi\mathrm{P_i} is initial pressure and Pt\mathrm{P_t}…MediumSingle correct
  4. 1 Feb 2024, Shift 2 · Q86The following data were obtained during the first order thermal decomposition of a gas A at constant volume :…MediumNumerical value
  5. 13 Apr 2023, Shift 2 · Q87A(g)→2B(g)+C(g)\mathrm{A(g)\rightarrow 2B(g)+C(g)} is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which…MediumNumerical value
  6. 4 Aug 2021, Shift 2 · Q59N2O5\mathrm{N_2O_5} decomposes following first order kinetics according to the reaction…HardNumerical value

Shifts: 4 Aug 2021, Shift 2, 13 Apr 2023, Shift 2, 31 Jan 2024, Shift 1, 1 Feb 2024, Shift 2, 7 Apr 2025, Shift 1, 2 Apr 2026, Shift 2.

Same topic

Other ideas in Integrated Rate Equations

Integrated Rate Equations has 15 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas