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Saturday, 31 October

JEE Main · Chemistry · States of Matter

Gas Density and Molar Mass

JEE Main asked Gas Density and Molar Mass 3 times in 3 of the 108 shifts Lumi analysed, in 2021 and 2022. It belongs to Ideal Gas Laws, in States of Matter (Chemistry). The longest wait between two years asking it was 1 year. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
2 of 8
First asked
2021
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.03’210.07’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 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
  • 20222 of 24
  • 20211 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.

  • Molar mass from vapour density
  • Graph interpretation of pressure vs density

Difficulty

Easy 1Medium 2Hard 0

2 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. 29 Jun 2022, Shift 1 · Q81Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46 gL−10.46\ \mathrm{gL^{-1}} at…MediumNumerical value
  2. 27 Jun 2022, Shift 2 · Q61Which amongst the given plots is the correct plot for pressure (p) vs density (d) for an ideal gas?EasyDiagram basedHas a figure
  3. 3 Aug 2021, Shift 1 · Q51Assuming H2\mathrm{H_2} is an ideal gas, consider the quantity “P.dd”, where ‘P’ is the pressure in atm and ‘dd’ is the density in g…MediumNumerical value

Shifts: 3 Aug 2021, Shift 1, 27 Jun 2022, Shift 2, 29 Jun 2022, Shift 1.

Same topic

Other ideas in Ideal Gas Laws

Ideal Gas Laws has 11 ideas JEE Main has asked; 6 of them came up in more than one question.

Topic analysisChapter analysisAll repeated ideas