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Saturday, 31 October

JEE Main · Chemistry · Chemical Kinetics

Zero Order Half-Life

JEE Main asked Zero Order Half-Life 3 times in 3 of the 108 shifts Lumi analysed, in 2023, 2025 and 2026. It belongs to Integrated Rate Equations, in Chemical Kinetics (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2023
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200’210’220.07’230’240.13’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20231 of 12
  • 20220 of 24
  • 20210 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: conceptual.

  • Half-life from linear graph
  • Concentration from half-life graph

Difficulty

Easy 1Medium 2Hard 0

3 of the 3 questions had a numerical answer.

Every question

All 3 questions

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

  1. 5 Apr 2026, Shift 2 · Q75For a reaction A→P\mathrm{A\to P} at T K, the half life (t1/2t_{1/2}) is plotted as a function of initial concentration [A]0[\mathrm{A}]_0 of A…EasyNumerical valueHas a figure
  2. 2 Apr 2025, Shift 1 · Q72For the reaction A →\rightarrow products. The concentration of A at 10 minutes is ___________ ×10−3\times10^{-3} mol L−1\mathrm{L^{-1}}…MediumNumerical valueHas a figure
  3. 10 Apr 2023, Shift 2 · Q87The number of incorrect statement/s from the following is ____________ A. The successive half lives of zero order reactions decreases with…MediumNumerical value

Shifts: 10 Apr 2023, Shift 2, 2 Apr 2025, Shift 1, 5 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