JEE Main Chemistry · Chemical Kinetics

Rate Laws in JEE Main

Name: Rate Laws: JEE Main previous year questions
Creator: Lumi

Rate Laws (Chemistry, Chemical Kinetics) came 9 times in 9 of the 42 JEE Main shifts Lumi analysed, across 7 distinct ideas. 6 of them came in 2024–26; it was last asked in 2026.

Questions: 9; in 9 shifts
Ideas asked: 7; 2 asked more than once
Numerical answer: 6; 67% 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 2Medium 7Hard 0

Format

Numerical value6 Q
Single correct2 Q
Diagram based1 Q

Ideas inside the topic

7 ideas

First-Order Kinetics2 Q
Rate and Stoichiometry2 Q
First-Order Kinetics via Total Pressure1 Q
First-Order Gas Phase Kinetics via Pressure1 Q
Initial Rates Method1 Q
Rate Constant Units1 Q
Rate vs Concentration Graphs1 Q

Where it sits

Part of Chemical Kinetics, which had 48 questions in all. Rate Laws accounts for 19% of them. In Lumi's JEE taxonomy it belongs to Physical Chemistry.

Every question

All 9 Rate Laws questions

Newest first, each with its options and official answer.

2 Apr 2026, Shift 2 · Q57Consider the reaction $aX \to bY$ , for which the rate constant at 30°C is $1 \times 10^{-3}$ mol $^{-1}$ L $s^{-1}$ . Which of the following…MediumSingle correct
7 Apr 2025, Shift 1 · Q57A person's wound was exposed to some bacteria and then bacterial growth started to happen at the same place. The wound was later treated…MediumDiagram basedHas a figure
7 Apr 2025, Shift 2 · Q57 $\mathrm{A(g)\to B(g)+C(g)}$ is a first order reaction. Time | $t$ | $\infty$ $p_{system}$ | $p_t$ | $p_\infty$ The reaction was started…MediumSingle correct
6 Apr 2024, Shift 2 · Q85Consider the two different first order reactions given below $A + B \rightarrow C$ (Reaction 1) $P \rightarrow Q$ (Reaction 2) The ratio…MediumNumerical value
9 Apr 2024, Shift 2 · Q85Consider the following first order gas phase reaction at constant temperature $\mathrm{A(g) \rightarrow 2B(g) + C(g)}$ If the total…MediumNumerical value
30 Jan 2024, Shift 2 · Q85 $\mathrm{NO_2}$ required for a reaction is produced by decomposition of $\mathrm{N_2O_5}$ in $\mathrm{CCl_4}$ as by equation…EasyNumerical value
11 Apr 2023, Shift 1 · Q87 $\mathrm{KClO_3 + 6FeSO_4 + 3H_2SO_4 \rightarrow KCl + 3Fe_2(SO_4)_3 + 3H_2O}$ The above reaction was studied at 300 K by monitoring the…MediumNumerical value
28 Jul 2022, Shift 1 · Q86For the given first order reaction $\mathrm{A\to B}$ the half life of the reaction is 0.3010 min. The ratio of the initial concentration…EasyNumerical value
18 Mar 2021, Shift 1 · Q57 $\mathrm{2\,NO(g) + Cl_2(g) \rightleftharpoons 2\,NOCl(s)}$ This reaction was studied at $-10$ °C and the following data was obtained run |…MediumNumerical value