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2026 /
Quiz 2

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NCAT Practice Test - Practice Test - Physics - Thermodynamics - 2026 Quiz

Attempt 10 MCQs on NCAT Practice Test - Practice Test - Physics - Thermodynamics (Year 2026) | Quiz 2

11. What condition defines an adiabatic process?

Q = 0
ΔU = 0
W = 0
P = constant

12. What is the work done in an isochoric process?

W = PΔV
W = 0
W = nRT ln(V₂/V₁)
W = -PΔV

13. How does Cp compare to Cv for an ideal gas?

Cp > Cv
Cp < Cv
Cp = Cv
Cp = 0

14. What is Mayer's relation for an ideal gas?

Cp + Cv = R
Cp - Cv = R
Cp/Cv = R
Cp × Cv = R

15. What are the molar specific heats for a monatomic ideal gas?

Cv = 3R/2, Cp = 5R/2
Cv = 5R/2, Cp = 3R/2
Cv = R, Cp = 2R
Cv = 2R, Cp = 3R

16. What are the molar specific heats for a diatomic ideal gas (excluding vibration)?

Cv = 3R/2, Cp = 5R/2
Cv = 5R/2, Cp = 7R/2
Cv = 7R/2, Cp = 9R/2
Cv = R, Cp = 2R

17. What is the value of γ = Cp/Cv for a monatomic gas?

5/3
7/5
4/3
3/2

18. What is the approximate γ for diatomic gases like nitrogen and oxygen?

1.67
1.4
1.33
1.2

19. According to the first law, heat added to a system can:

Only increases internal energy
Only does work
Increases internal energy and/or does work
Neither

20. How is work done by a gas represented on a P-V diagram?

Area under P-V curve
P × V
nRT ln(V₂/V₁) for isothermal
All of these

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