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Saturday, 31 October

JEE Main · Chemistry · Chemical Kinetics

Effective Activation Energy for Complex Reactions

JEE Main asked Effective Activation Energy for Complex Reactions 2 times in 2 of the 108 shifts Lumi analysed, all in 2024. It belongs to Arrhenius Equation, in Chemical Kinetics (Chemistry). In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
1 of 8
First asked
2024
the only year
Pattern
New since 2024
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200’210’220’230.09’240’250’26

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

Shift by shift

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

  • 20260 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 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: calculation.

  • Overall ea from composite rate constant
  • Overall activation energy for k = k1k2/k3

Difficulty

Easy 0Medium 2Hard 0

2 of the 2 questions had a numerical answer.

Every question

All 2 questions

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

  1. 29 Jan 2024, Shift 1 · Q87For a reaction taking place in three steps at same temperature, overall rate constant K=K1K2K3K=\frac{K_1K_2}{K_3}. If Ea1Ea_1, Ea2Ea_2 and Ea3Ea_3…MediumNumerical value
  2. 4 Apr 2024, Shift 1 · Q85Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below.…MediumNumerical value

Shifts: 29 Jan 2024, Shift 1, 4 Apr 2024, Shift 1.

Same topic

Other ideas in Arrhenius Equation

Arrhenius Equation has 10 ideas JEE Main has asked; 7 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas