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. Specific heat is lowest for:

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

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

4. The SI unit of heat is:

5. Which of the following expresses work done at constant pressure?

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

7. In which process is ΔU = Q?

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

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

10. What is the heat added in an adiabatic process?

11. Which law defines the mechanical equivalent of heat?

12. Which equation represents the first law of thermodynamics?

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

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

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

16. When a system performs positive work, it means:

17. When a gas expands doing work and absorbs heat, its internal energy:

18. What is specific heat?

19. What does a negative ΔU indicate?

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

21. Which of the following statements is true about heat?

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

23. Which thermodynamic process has both Q and W equal to zero?

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

25. The heat required to raise the temperature of one mole of a substance by one Kelvin is:


 

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Mustansar KhanLast Updated: October 13, 2025

Mustansar Khan

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