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Saturday, 31 October

JEE Main · Physics · Thermodynamics

Heat in Isochoric and Isobaric Processes

JEE Main asked Heat in Isochoric and Isobaric Processes 5 times in 5 of the 108 shifts Lumi analysed, in 2021, 2022, 2024 and 2026. It belongs to First Law of Thermodynamics, in Thermodynamics (Physics). 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
5
in 5 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, 2022, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200.03’210.07’220’230.05’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20230 of 12
  • 20222 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

Single correct is the usual form. Skill tested: calculation.

  • Heat supplied in isobaric heating
  • Heat to raise temperature at constant volume

Difficulty

Easy 4Medium 1Hard 0

1 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. 8 Apr 2026, Shift 2 · Q35One mole of diatomic gas having rotational modes only is kept in a cylinder with a piston system. The cross-section area of the cylinder…MediumSingle correct
  2. 1 Feb 2024, Shift 2 · Q38A diatomic gas (γ=1.4\gamma = 1.4) does 200 J of work when it is expanded isobarically. The heat given to the gas in the process is :EasySingle correct
  3. 29 Jun 2022, Shift 1 · Q35A cylinder of fixed capacity of 44.8 litres contains helium gas at standard temperature and pressure. The amount of heat needed to raise…EasySingle correct
  4. 27 Jun 2022, Shift 2 · Q53A diatomic gas (γ\gamma = 1.4) does 400J of work when it is expanded isobarically. The heat given to the gas in the process is __________…EasyNumerical value
  5. 25 Feb 2021, Shift 1 · Q18A diatomic gas, having CP=72RC_P=\frac{7}{2}R and CV=52RC_V=\frac{5}{2}R, is heated at constant pressure. The ratio dU : dQ : dW :EasySingle correct

Shifts: 25 Feb 2021, Shift 1, 27 Jun 2022, Shift 2, 29 Jun 2022, Shift 1, 1 Feb 2024, Shift 2, 8 Apr 2026, Shift 2.

Same topic

Other ideas in First Law of Thermodynamics

First Law of Thermodynamics has 21 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas