A. (∂P/∂V)S = (∂P/∂V)T
B. (∂P/∂V)S = [(∂P/∂V)T]Y
C. (∂P/∂V)S = y(∂P/∂V)T
D. (∂P/∂V)S = 1/y(∂P/∂V)T
✅ The correct answer is option C.
Thermodynamics MCQs
An ideal liquid refrigerant should
A. Not have a subatmospheric vapour pressure at the temperature in the refrigerator coils
B. Not have unduly high vapour pressure at the condenser temperature
C. Both A and B
D. Have low specific heat
✅ The correct answer is option C.
Fugacity and pressure are numerically equal, when the gas is
A. In standard state
B. At high pressure
C. At low temperature
D. In ideal state
✅ The correct answer is option D.
Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are
A. Always greater than one
B. Same at the same reduced temperature
C. Same at the same reduced pressure
D. Both B & C
✅ The correct answer is option D.
Melting of wax is accompanied with __________ in entropy.
A. Increase
B. Decrease
C. No change
D. None of these
✅ The correct answer is option A.
Which of the following is true for Virial equation of state?
A. Virial co-efficients are universal constants
B. Virial co-efficients
C. Virial co-efficients are function of temperature only
D. For some gases, Virial equations and ideal gas equations are the same
✅ The correct answer is option C.
Domestic refrigerator usually works on the __________ refrigeration cycle.
A. Carnot
B. Air
C. Absorption
D. Vapour-ejection
✅ The correct answer is option C.
In the decomposition of PCl5 represented by, PCl5 ⇋ PCl3 + Cl₂, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.
A. Increase
B. Decrease
C. Not alter
D. None of these
✅ The correct answer is option A.
__________ law of thermodynamics ascertains the direction of a particular spontaneous process.
A. Zeroth
B. First
C. Second
D. Third
✅ The correct answer is option C.
Which of the following processes can not be made reversible even under ideal condition of operation?
A. Free expansion of a gas
B. Compression of air in a compressor
C. Expansion of steam in a turbine
D. All of the above
✅ The correct answer is option A.