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Saturday, 31 October

JEE Main · Chemistry · Some Basic Concepts of Chemistry

Mass-Volume Stoichiometry at STP

JEE Main asked Mass-Volume Stoichiometry at STP 3 times in 3 of the 108 shifts Lumi analysed, in 2022, 2023 and 2025. It belongs to Stoichiometry, in Some Basic Concepts of Chemistry (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2022
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2023 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200’210.03’220.07’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20240 of 18
  • 20231 of 12
  • 20221 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.

  • Mass of reactant from gas volume
  • Volume of gas liberated at stp

Difficulty

Easy 2Medium 1Hard 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. 3 Apr 2025, Shift 2 · Q51Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of Mg is…EasySingle correct
  2. 11 Apr 2023, Shift 2 · Q81The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is __________ ×10−2\times 10^{-2} L…EasyNumerical value
  3. 29 Jul 2022, Shift 2 · Q88A 1.84 mg sample of polyhydric alcoholic compound ‘X’ of molar mass 92.0 g/mol gave 1.344 mL of H2\mathrm{H_2} gas at STP. The number of…MediumNumerical value

Shifts: 29 Jul 2022, Shift 2, 11 Apr 2023, Shift 2, 3 Apr 2025, Shift 2.

Same topic

Other ideas in Stoichiometry

Stoichiometry has 24 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas