Thermodynamics Online Mcqs Test

Mustansar KhanLast Updated: October 13, 2025

Important Physics Thermodynamics Question and Answer

Total Questions: 49
Time Allowed: 25 Minutes
Total Marks: 49
How to Attempt Test: Please choose the right Option in MCQ-type question.
Test Helpful For: Physics Test
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Physics Thermodynamics Practice Test Online With Explanation

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1. What happens to the internal energy in an adiabatic expansion?

2. The SI unit of heat is:

3. In which process is ΔU = Q?

4. Which equation represents the first law of thermodynamics?

5. Which of the following has the highest molar specific heat at constant pressure?

6. Which of the following has units J/mol·K?

7. Which process occurs without any change in heat content?

8. Which physical quantity is represented by the slope of a temperature vs. heat graph during heating?

9. In a system where no heat is added and work is done on the gas, internal energy:

10. When W = Q in the first law equation, what is ΔU?

11. In an adiabatic process, if work is positive:

12. What is specific heat?

13. In the first law of thermodynamics, the internal energy change is equal to:

14. What is the heat required to raise the temperature of 5 kg of a substance with specific heat 200 J/kg·K by 3 K?

15. Which gas law is used in the derivation of the first law of thermodynamics?

16. What does the term “internal energy” refer to?

17. What is the value of specific heat of water?

18. In the equation ΔU = Q – W, what does a positive W indicate?

19. What happens to internal energy during an isothermal expansion?

20. Which of the following has the highest specific heat?

21. Which law defines the mechanical equivalent of heat?

22. Molar specific heat is the amount of heat required to:

23. The temperature of a gas is directly proportional to:

24. If Q = 200 J and W = 50 J, what is the change in internal energy?

25. Which of the following is an extensive property?


 

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Mustansar KhanLast Updated: October 13, 2025

Mustansar Khan

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