Example 1 · difficulty 2/5
A gas absorbs 500 J of heat and performs 200 J of work. What is its change in internal energy?
- A. −700 J
- B. −300 J
- C. +300 J
- D. +700 J
2023 source guide · Physics
NEET 2023 Physics Thermodynamics Questions
Use this page to connect the official 2023 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
For a quasistatic expansion represented on a pressure-volume diagram, what does the area under the process curve equal?
- A. Change in temperature
- B. Heat capacity of the gas
- C. Change in internal energy
- D. Work done by the gas
Example 3 · difficulty 2/5
A gas expands irreversibly against a constant external pressure Pext from V1 to V2. Which expression gives the work done by the gas?
- A. Pext(V2 − V1)
- B. Pext(V1 − V2)
- C. (V2 − V1)/Pext
- D. Zero for every irreversible expansion
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 2023 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 2023 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.