Learn

Saturday, 31 October

JEE Main · Chemistry · Chemical Kinetics

Order vs Molecularity

JEE Main asked Order vs Molecularity 2 times in 2 of the 108 shifts Lumi analysed, in 2020 and 2021. It belongs to Rate Laws, in Chemical Kinetics (Chemistry). The longest wait between two years asking it was 1 year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
2 of 8
First asked
2020
last in 2021
Pattern
Gone quiet
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020 and 2021. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200.03’210’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20211 of 24
  • 20201 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.

  • Rate change on reducing vessel volume
  • True statement on order and reaction steps

Difficulty

Easy 2Medium 0Hard 0

1 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. 17 Mar 2021, Shift 2 · Q57The reaction 2A+B2→2AB\mathrm{2A + B_2 \rightarrow 2AB} is an elementary reaction. For a certain quantity of reactants, if the volume of the…EasyNumerical value
  2. 3 Sep 2020, Shift 1 · Q26It is true that :EasySingle correct

Shifts: 3 Sep 2020, Shift 1, 17 Mar 2021, Shift 2.

Same topic

Other ideas in Rate Laws

Rate Laws has 13 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas