JEE Thermodynamics PYQs — every cycle, every law, solved
First law, second law, PV diagrams, heat engines and kinetic theory — every JEE Main and Advanced PYQ on Thermodynamics with step-by-step solutions.
Thermodynamics is one of the most rewarding chapters in JEE Physics — concepts are finite, formulas are few, but PYQs test deep conceptual reasoning around PV diagrams, mixed processes and engine efficiency.
This page collects every Thermodynamics PYQ across the last 25+ years of JEE Main and JEE Advanced, with annotated PV diagrams and a step-by-step breakdown of work, heat and internal energy at every stage.
Built to move your JEE rank — not just to look pretty
All process types covered
Isothermal, adiabatic, isobaric, isochoric — solved with formulas and diagrams.
Annotated PV cycles
Every cycle PYQ annotated with W, Q, ΔU stage by stage.
Heat engine + efficiency PYQs
Carnot, Otto, Diesel cycles and their efficiency calculations.
Kinetic theory included
Mean speed, RMS, degrees of freedom, Cv/Cp ratios.
Get going in under 60 seconds
- 1
Memorise process formulas
Build the W, Q, ΔU table for each process before opening PYQs.
- 2
Solve PV cycle PYQs
Annotate each leg with W, Q, ΔU — that's where most marks are won.
- 3
Finish with kinetic theory
Numerical PYQs on RMS, Cv/Cp and degrees of freedom.
A taste of what's inside
PV Cycle — JEE Advanced 2023
First Law — JEE Main 2024
What students are saying
“PV diagrams used to scare me — now they're free marks.”
Frequently asked
How many Thermodynamics PYQs are available?
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400+ Thermodynamics PYQs across 25+ years of JEE Main and Advanced.
What topics fall under Thermodynamics for JEE Physics?
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First law of thermodynamics, isothermal/adiabatic/isobaric/isochoric processes, work-energy in PV diagrams, heat engines, second law and entropy, kinetic theory of gases.
Is Thermodynamics common between Physics and Chemistry?
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The first law overlaps but conventions differ. JEE Physics uses ΔU = Q + W (work done on the gas), Chemistry uses ΔU = Q − W (work done by the gas). Both are covered separately on IITMentor.
Are PV diagram questions included?
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Yes — every PV-cycle PYQ is annotated with work, heat and internal energy changes step-by-step.
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