A. Third law of thermodynamics
B. Second law of thermodynamics
C. Nernst heat theorem
D. Maxwell’s relations
✅ The correct answer is option A.
Thermodynamics MCQs
The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.
A. Freezing
B. Triple
C. Boiling
D. Boyle
✅ The correct answer is option B.
Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the
A. Low pressure and high temperature
B. Low pressure and low temperature
C. High pressure and low temperature
D. High pressure and high temperature
✅ The correct answer is option B.
Cv is given by
A. (∂E/∂T)V
B. (∂E/∂V)T
C. (∂E/∂P)V
D. (∂V/∂T)P
✅ The correct answer is option A.
The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
A. Lowest
B. Highest
C. Average
D. None of these
✅ The correct answer is option A.
Which of the following is not correct for a reversible adiabatic process?
A. TVγ-1 = constant
B. P1-γ.TY = constant
C. PVγ = constant
D. None of these
✅ The correct answer is option D.
Which of the following is not an extensive property?
A. Free energy
B. Entropy
C. Refractive index
D. None of these
✅ The correct answer is option C.
The activity of an ideal gas is numerically __________ its pressure.
A. More than
B. Less than
C. Equal to
D. Data insufficient, can’t be predicted
✅ The correct answer is option C.
All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.
A. Oxygen
B. Nitrogen
C. Air
D. Hydrogen
✅ The correct answer is option D.
In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.
A. 0.25
B. 0.5
C. 0.75
D. 1
✅ The correct answer is option B.