Learn

Saturday, 31 October

JEE Main · Chemistry · Kinetic Theory

Connected Gas Bulbs Equilibrium

JEE Main asked Connected Gas Bulbs Equilibrium 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2023, 2025 and 2026. It belongs to Ideal Gas Laws, in Kinetic Theory (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
4 of 8
First asked
2021
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2023, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.03’210’220.07’230’240.13’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20240 of 18
  • 20231 of 12
  • 20220 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.

  • Final pressure in connected vessels
  • Final pressure when gas vessels are connected

Difficulty

Easy 0Medium 4Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 questions

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

  1. 6 Apr 2026, Shift 1 · Q35Two closed vessels of same volume are joined through a narrow tube and both vessels are filled with air of pressure 90 kPa and temperature…MediumSingle correct
  2. 4 Apr 2025, Shift 2 · Q45There are two vessels filled with an ideal gas where volume of one is double the volume of other. The large vessel contains the gas at 8…MediumSingle correct
  3. 8 Apr 2023, Shift 1 · Q81[figure: three bulbs joined by pipes with stopcocks] Three bulbs are filled with CH4\mathrm{CH_4}, CO2\mathrm{CO_2} and Ne as shown in the…MediumNumerical valueHas a figure
  4. 27 Aug 2021, Shift 2 · Q52Two flasks I and II shown below are connected by a valve of negligible volume. [figure: two circular flasks joined through a valve; flask…MediumNumerical valueHas a figure

Shifts: 27 Aug 2021, Shift 2, 8 Apr 2023, Shift 1, 4 Apr 2025, Shift 2, 6 Apr 2026, 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 analysisStudy this chapterAll repeated ideas