Example 1 · difficulty 1/5
For a fixed amount of an ideal gas undergoing an isothermal process, what is the change in internal energy?
- A. Zero
- B. Negative for expansion
- C. Positive for expansion
- D. Equal to the pressure change
2025 source guide · Physics
NEET 2025 Physics Thermodynamics Questions
Use this page to connect the official 2025 paper with current Physics practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
state variables, heat, work, thermodynamic processes and heat engines.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
An ideal gas expands isothermally and does 800 J of work. How much heat does it absorb?
- A. 0 J
- B. 800 J
- C. 400 J
- D. 1600 J
Example 3 · difficulty 1/5
Which defining condition applies to an adiabatic process?
- A. Temperature remains constant
- B. Pressure remains constant
- C. No heat is exchanged with the surroundings
- D. Internal energy remains constant
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2025 Physics Thermodynamics PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2025 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.