MDCAT Physics — Thermodynamics
Thermodynamics is a core Physics topic in the PMDC MDCAT syllabus, covering 11 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (11)
- Adiabatic Process
- Cp minus Cv Relation for Ideal Gas
- First Law of Thermodynamics
- Gas Laws
- Isothermal Process
- Kinetic Theory of Gases
- Reversible and Irreversible Processes
- Solar Constant and Radiation
- Specific and Molar Specific Heat
- Thermal Equilibrium and Heat
- Work in Thermodynamic System
How Thermodynamics is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Thermodynamics accounts for 51 questions. It appears in 15 of them, about 3.4 questions a paper. The heaviest was MDCAT 2015, with 6 questions, and the most recent is MDCAT 2025, with 2.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 2 |
| MDCAT 2024 | 2 |
| MDCAT 2023 | 3 |
| MDCAT 2022 | 1 |
| MDCAT 2019 | 1 |
| MDCAT 2018 | 2 |
| MDCAT 2017 | 3 |
| MDCAT 2016 | 4 |
| MDCAT 2015 | 6 |
| MDCAT 2014 | 3 |
| MDCAT 2013 | 5 |
| MDCAT 2012 | 5 |
| MDCAT 2011 | 5 |
| MDCAT 2010 | 5 |
| MDCAT 2009 | 4 |
Thermodynamics MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Thermodynamics
Earth receives a large amount of energy directly from:
- A.Wind
- B.Water
- C.Sun
- D.Moon
Show answer
Answer: C. Sun — Earth receives a large amount of energy directly from the Sun.
- Q2 · MDCAT 2024 · Thermodynamics
During the isothermal process, the temperature
- A.remains constant during the initial phase of the process
- B.remains constant throughout the process
- C.alters throughout the process
- D.increases throughout the process
Show answer
Answer: B. remains constant throughout the process — In an isothermal process, temperature stays constant throughout (that's the defining condition).
- Q3 · MDCAT 2023 · Thermodynamics
For an ideal gas equation PV = nRT, the dimensions of Real Gas Constant R are:
- A.[M¹ L² T⁻² K⁻¹]
- B.[M¹ L⁻³ T⁻¹ K⁻¹]
- C.[M¹ L⁻² T⁻¹ K⁻¹]
- D.[M¹ L⁻³ T⁻² K⁻¹]
Show answer
Answer: A. [M¹ L² T⁻² K⁻¹] — From PV = nRT, R = PV/(nT) is energy per mole per kelvin, with dimensions [M L² T⁻² K⁻¹].