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Saturday, 31 October

JEE Main · Physics · Thermodynamics

Isothermal Process Analysis

JEE Main asked Isothermal Process Analysis 3 times in 3 of the 108 shifts Lumi analysed, in 2021, 2023 and 2025. It belongs to Thermodynamic Processes, in Thermodynamics (Physics). 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
2021
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200.03’210’220.07’230’240.13’250’26

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: 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
  • 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

Match the list is the usual form. Skill tested: recall.

  • Match list on thermodynamic processes
  • Identify process with constant internal energy

Difficulty

Easy 3Medium 0Hard 0

Every question was multiple choice.

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. 7 Apr 2025, Shift 2 · Q34Match List - I with List - II. List - I | List - II (A) Isothermal | (I) ΔW\Delta W (work done) =0=0 (B) Adiabatic | (II) ΔQ\Delta Q…EasyMatch the list
  2. 11 Apr 2023, Shift 2 · Q34The Thermodynamic process, in which internal energy of the system remains constant isEasySingle correct
  3. 24 Feb 2021, Shift 1 · Q10Match List I with List II. List I | List II (a) Isothermal | (i) Pressure constant (b) Isochoric | (ii) Temperature constant (c) Adiabatic…EasyMatch the list

Shifts: 24 Feb 2021, Shift 1, 11 Apr 2023, Shift 2, 7 Apr 2025, Shift 2.

Same topic

Other ideas in Thermodynamic Processes

Thermodynamic Processes has 16 ideas JEE Main has asked; 8 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas