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Saturday, 31 October

JEE Main · Chemistry · Equilibrium

Kp Expression via Partial Pressures

JEE Main asked Kp Expression via Partial Pressures 4 times in 4 of the 108 shifts Lumi analysed, in 2022 and 2024. It belongs to Chemical Equilibrium, in Equilibrium (Chemistry). The longest wait between two years asking it was 2 years. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
2 of 8
First asked
2022
last in 2024
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200’210.10’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 3 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20230 of 12
  • 20223 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.

  • Kp from equal molecules of reactants and product
  • Kp from equilibrium moles and pressure

Difficulty

Easy 0Medium 3Hard 1

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 2024, Shift 1 · Q63At −20-20 °C and 1 atm pressure, a cylinder is filled with equal number of H2\mathrm{H_2}, I2\mathrm{I_2} and HI molecules for the reaction…MediumSingle correct
  2. 29 Jun 2022, Shift 2 · Q644.0 moles of argon and 5.0 moles of PCl5\mathrm{PCl_5} are introduced into an evacuated flask of 100 litre capacity at 610 K. The system is…MediumSingle correct
  3. 24 Jun 2022, Shift 2 · Q83PCl5_5 dissociates as PCl5_5(g)⇌\rightleftharpoonsPCl3_3(g)+Cl2_2(g) 5 moles of PCl5_5 are placed in a 200 litre vessel which…HardNumerical value
  4. 28 Jul 2022, Shift 2 · Q55At 600K, 2 mol of NO are mixed with 1 mol of O2\mathrm{O_2}. 2NO(g)+O2 (g)⇌2NO2(g)\mathrm{2NO_{(g)}+O_2\,(g)\rightleftharpoons 2NO_2(g)} The reaction…MediumNumerical value

Shifts: 24 Jun 2022, Shift 2, 29 Jun 2022, Shift 2, 28 Jul 2022, Shift 2, 6 Apr 2024, Shift 1.

Same topic

Other ideas in Chemical Equilibrium

Chemical Equilibrium has 17 ideas JEE Main has asked; 11 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas