A. Specific volume
B. Temperature
C. Mass
D. Pressure
✅ The correct answer is option C.
Thermodynamics MCQs
The fusion of a crystalline solid at its melting point to form a liquid at the same temperature is accompanied by
A. Decrease in enthalpy corresponding to evolution of heat
B. Decrease of entropy
C. Increase in enthalpy corresponding to absorption of heat
D. No change in enthalpy
✅ The correct answer is option C.
For an irreversible process involving only pressure-volume work
A. (dF)T, p <0
B. (dF)T, p = 0
C. (dF)T, p > 0
D. (dA)T, v >0
✅ The correct answer is option A.
Entropy is a/an
A. State function
B. Macroscopic property
C. Extensive property
D. None of these
✅ The correct answer is option D.
A gas can be liquified by pressure alone only, when its temperature is __________ its critical temperature.
A. Less than
B. More than
C. Equal to or higher than
D. Less than or equal to
✅ The correct answer is option D.
The variation of heat of reaction with temperature at constant pressure is given by the __________ law.
A. Kelvin’s
B. Antonie’s
C. Kirchoffs
D. None of these
✅ The correct answer is option C.
The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are
A. Zero
B. One
C. Two
D. Three
✅ The correct answer is option B.
Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . °K
A. 0
B. ∞
C. 50
D. 100
✅ The correct answer is option B.
The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is
A. A . x₂²
B. Ax₁
C. Ax₂
D. Ax₁²
✅ The correct answer is option A.
If two gases have same reduced temperature and reduced pressure, then they will have the same
A. Volume
B. Mass
C. Critical temperature
D. None of these
✅ The correct answer is option D.