JEE Main Chemistry · Chemical Kinetics

Gas Kinetics with Complex Stoichiometry

Gas Kinetics with Complex Stoichiometry (Chemical Kinetics) was asked 4 times in 4 JEE Main shifts, 2023–2026, out of the 42 shifts Lumi analysed. 2 of the 4 had a numerical answer.

Times asked: 4; in 4 shifts
Years: 2023–2026
Usual format: Numerical value; Multi-step
Pattern: Comes in cycles; repeats across shifts

How it is asked

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

Difficulty

Easy 0Medium 4Hard 0

Where it sits

Chapter: Chemical Kinetics. Topic: Integrated Rate Equations, 24 questions over 12 ideas.

All 4 questions

Newest first, each with its options and official answer.

2 Apr 2026, Shift 2 · Q72Consider the following gas phase reaction being carried out in a closed vessel at 25°C. $2A(g) \longrightarrow 4B(g) + C(g)$ | time (min)…MediumNumerical value
7 Apr 2025, Shift 1 · Q56Reaction $\mathrm{A(g) \rightarrow 2B(g) + C(g)}$ is a first order reaction. It was started with pure A t/min | Pressure of system at time…MediumOtherHas a figure
31 Jan 2024, Shift 1 · Q65Integrated rate law equation for a first order gas phase reaction is given by (where $\mathrm{P_i}$ is initial pressure and $\mathrm{P_t}$ …MediumSingle correct
13 Apr 2023, Shift 2 · Q87 $\mathrm{A(g)\rightarrow 2B(g)+C(g)}$ is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which…MediumNumerical value