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Saturday, 31 October

JEE Main · Chemistry · Some Basic Concepts of Chemistry

Molar Mass and Gas Volume

JEE Main asked Molar Mass and Gas Volume 5 times in 5 of the 108 shifts Lumi analysed, in 2017, 2022 and 2026. It belongs to Mole Concept, in Some Basic Concepts of Chemistry (Chemistry). The longest wait between two years asking it was 5 years, across 2018 and 2019, which Lumi has no shifts for. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
3 of 8
First asked
2017
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

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

00.510.83’170’200’210.10’220’230’240’250.11’26

Raw count: 2017: 1 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 3 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 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
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20223 of 24
  • 20210 of 24
  • 20200 of 12
  • 20171 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.

  • Moles and molecules from gas volume
  • Molar mass from moles of gas evolved

Difficulty

Easy 2Medium 3Hard 0

3 of the 5 questions had a numerical answer.

Every question

All 5 questions

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

  1. 4 Apr 2026, Shift 1 · Q51Number of moles and number of molecules in 1.41871.4187 L of SO2\mathrm{SO_2} at STP respectively areEasySingle correct
  2. 28 Jun 2022, Shift 2 · Q81100 g of an ideal gas is kept in a cylinder of 416 L volume at 27°C under 1.5 bar pressure. The molar mass of the gas is __________ g…MediumNumerical value
  3. 27 Jun 2022, Shift 1 · Q89Two elements A and B which form 0.15 moles of A2B\mathrm{A_2B} and AB3\mathrm{AB_3} type compounds. If both A2B\mathrm{A_2B} and…MediumNumerical value
  4. 25 Jul 2022, Shift 2 · Q88A sample of 4.5 mg of an unknown monohydric alcohol, R-OH was added to methylmagnesium iodide. A gas is evolved and is collected and its…MediumNumerical value
  5. 2 Apr 2017 (offline) · Q321 gram of a carbonate (M2CO3\mathrm{M_2CO_3}) on treatment with excess HCl produces 0.01186 mole of CO2\mathrm{CO_2}. The molar mass of…EasySingle correct

Shifts: 2 Apr 2017 (offline), 27 Jun 2022, Shift 1, 28 Jun 2022, Shift 2, 25 Jul 2022, Shift 2, 4 Apr 2026, Shift 1.

Same topic

Other ideas in Mole Concept

Mole Concept has 18 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas