JEE Main Chemistry · Chemical Kinetics

Integrated Rate Equations in JEE Main

Name: Integrated Rate Equations: JEE Main previous year questions
Creator: Lumi

Integrated Rate Equations (Chemistry, Chemical Kinetics) came 24 times in 22 of the 42 JEE Main shifts Lumi analysed, across 12 distinct ideas. 19 of them came in 2024–26; it was last asked in 2026.

Questions: 24; in 22 shifts
Ideas asked: 12; 6 asked more than once
Numerical answer: 14; 58% of its questions
Pattern: Asked most years; last asked 2026

Questions each year

In the shifts Lumi analysed for each year.

Difficulty and format

Easy 8Medium 16Hard 0

Format

Numerical value14 Q
Single correct8 Q
Other1 Q
Diagram based1 Q

Ideas inside the topic

12 ideas

First Order Integrated Rate Law5 Q
Gas Kinetics with Complex Stoichiometry4 Q
Concentration After n Half-Lives3 Q
Kinetic Graphical Identification2 Q
Zero Order Integrated Rate Law2 Q
Zero Order Half-Life2 Q
First Order Exponential Form1 Q
First Order Fractional Life Relationships1 Q
First Order Fractional Completion Shortcuts1 Q
Gas Phase First-Order Kinetics1 Q
Nth-Order Half-Life Proportionality1 Q
Zero Order Reaction Completion Time1 Q

Where it sits

Part of Chemical Kinetics, which had 48 questions in all. Integrated Rate Equations accounts for 50% of them. In Lumi's JEE taxonomy it belongs to Physical Chemistry.

Some questions sit in other chapters too: Equilibrium.

Every question

All 24 Integrated Rate Equations questions

Newest first, each with its options and official answer.

2 Apr 2026, Shift 1 · Q58 $t_{100\%}$ is the time required for the $100\%$ completion of the reaction while $t_{1/2}$ is the time required for $50\%$ of the…MediumSingle correct
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
4 Apr 2026, Shift 1 · Q57Consider the first order reaction $\mathrm{R}\rightarrow\mathrm{P}$ . The fraction of molecules decomposed in the given first order…EasySingle correct
4 Apr 2026, Shift 2 · Q63Consider the given graph showing variation of reactant concentration with time. Three different reactions were started with identical…MediumSingle correctHas a figure
4 Apr 2026, Shift 2 · Q74For a first order reaction $\mathrm{A\rightarrow B}$ [table: t/min = 0, x, 20; [A]/M = 0.6500, 0.0650, 0.00065] $x=$ ________ min.…MediumNumerical value
5 Apr 2026, Shift 1 · Q57First order gas phase reaction $\mathrm{A \rightarrow B + C}$ $p_i$ = initial pressure of gas A, $p_t$ = total pressure of the reaction…MediumSingle correct
5 Apr 2026, Shift 1 · Q75If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction will be ________…EasyNumerical value
5 Apr 2026, Shift 2 · Q75For a reaction $\mathrm{A\to P}$ at T K, the half life ( $t_{1/2}$ ) is plotted as a function of initial concentration $[\mathrm{A}]_0$ of A…EasyNumerical valueHas a figure
6 Apr 2026, Shift 1 · Q74Sucrose hydrolyses in acidic medium into glucose and fructose by first order rate law with $\mathrm{t_{1/2}}=3$ hour. The percentage of…EasyNumerical value
2 Apr 2025, Shift 1 · Q72For the reaction A $\rightarrow$ products. The concentration of A at 10 minutes is ___________ $\times10^{-3}$ mol $\mathrm{L^{-1}}$ …MediumNumerical valueHas a figure
2 Apr 2025, Shift 2 · Q71For the reaction $A \rightarrow B$ the following graph was obtained. The time required (in seconds) for the concentration of A to reduce…MediumNumerical valueHas a figure
3 Apr 2025, Shift 1 · Q58In a reaction $\mathrm{A} + \mathrm{B} \rightarrow \mathrm{C}$ , initial concentrations of A and B are related as…MediumSingle correct
4 Apr 2025, Shift 2 · Q54Half life of zero order reaction $\mathrm{A\rightarrow product}$ is 1 hour, when initial concentration of reactant is…EasySingle correct
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
8 Apr 2025, Shift 2 · Q54In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its initial…EasySingle correct
8 Apr 2024, Shift 1 · Q85Consider the following reaction $\mathrm{A + B \rightarrow C}$ The time taken for A to become $1/4^{\mathrm{th}}$ of its initial…MediumNumerical value
9 Apr 2024, Shift 1 · Q86Given below are two statements : Statement I : The rate law for the reaction $\mathrm{A + B \rightarrow C}$ is rate…EasyNumerical valueHas 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
31 Jan 2024, Shift 2 · Q85r = k [A] for a reaction, 50% of A is decomposed in 120 minutes. The time taken for 90% decomposition of A is _________ minutes.MediumNumerical value
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
25 Jul 2022, Shift 1 · Q85The half life for the decomposition of gaseous compound A is $240$ s when the gaseous pressure was $500$ Torr initially. When the pressure…EasyNumerical value
3 Aug 2021, Shift 2 · Q57The inactivation process of virus is first order with respect to virus concentration and 2% of the virus was inactivated in the first one…MediumNumerical value
25 Jul 2021, Shift 1 · Q31For the following graphs, (a) Rate vs Time: horizontal line (b) $t_{1/2}$ vs Initial concentration: straight line through origin with…MediumDiagram basedHas a figure
16 Mar 2021, Shift 2 · Q58A and B decompose via first order kinetics with half-lives 54.0 min and 18.0 min respectively. Starting from an equimolar non reactive…MediumNumerical value