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Saturday, 31 October

JEE Main · Physics · Kinetic Theory

Mean Free Path

JEE Main asked Mean Free Path 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2024. It belongs to Kinetic Theory of Gases, in Kinetic Theory (Physics). The longest wait between two years asking it was 2 years. In 2021 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
4 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170.08’200.07’210.03’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 1 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
  • 20221 of 24
  • 20212 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Other is the usual form. Skill tested: conceptual.

  • Mean free path from conditions
  • Statement i/ii on kinetic theory of gases

Difficulty

Easy 4Medium 2Hard 0

1 of the 6 questions had a numerical answer.

Every question

All 6 questions

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

  1. 8 Apr 2024, Shift 2 · Q39Given below are two statements : Statement (I) : The mean free path of gas molecules is inversely proportional to square of molecular…EasyTwo statements
  2. 5 Apr 2024, Shift 2 · Q39If n is the number density and d is the diameter of the molecule, then the average distance covered by a molecule between two successive…EasySingle correct
  3. 27 Jun 2022, Shift 2 · Q38According to kinetic theory of gases, A. The motion of the gas molecules freezes at 0°C. B. The mean free path of gas molecules decreases…MediumOther
  4. 16 Mar 2021, Shift 2 · Q7Calculate the value of mean free path (λ\lambda) for oxygen molecules at temperature 27∘C27^\circ\mathrm{C} and pressure 1.01×1051.01\times10^5…EasySingle correct
  5. 25 Jul 2021, Shift 2 · Q23A system consists of two types of gas molecules A and B having same number density 2×10252\times10^{25}/m3^3. The diameter of A and B are 10…EasyNumerical value
  6. 2 Sep 2020, Shift 2 · Q9An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true ? (A) the…MediumOther

Shifts: 2 Sep 2020, Shift 2, 16 Mar 2021, Shift 2, 25 Jul 2021, Shift 2, 27 Jun 2022, Shift 2, 5 Apr 2024, Shift 2, 8 Apr 2024, Shift 2.

Same topic

Other ideas in Kinetic Theory of Gases

Kinetic Theory of Gases has 22 ideas JEE Main has asked; 14 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas