A. 0
B. 1
C. ∞
D. None of these
✅ The correct answer is option B.
Thermodynamics MCQs
Which of the following liquid metals has the highest thermal conductivity?
A. Molten sodium
B. Molten lead
C. Mercury
D. Molten potassium
✅ The correct answer is option A.
The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are
A. 5 & 3
B. 3.987 & 1.987
C. 1.987 & 0.66
D. 0.66 & 1.987
✅ The correct answer is option A.
In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.
A. Isobaric
B. Isothermal
C. Isentropic
D. Isometric
✅ The correct answer is option A.
Degree of freedom of the system ice-water-vapour will be
A. 0
B. 1
C. 2
D. 3
✅ The correct answer is option A.
Third law of thermodynamics is concerned with the
A. Value of absolute entropy
B. Energy transfer
C. Direction of energy transfer
D. None of these
✅ The correct answer is option A.
Lenz’s law results from the law of conservation of
A. Mass
B. Momentum
C. Energy
D. None of these
✅ The correct answer is option C.
Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a
A. Straight line
B. Sine curve
C. Parabola
D. Hyperbola
✅ The correct answer is option A.
Ideal refrigeration cycle is
A. Same as Carnot cycle
B. Same as reverse Carnot cycle
C. Dependent on the refrigerant’s properties
D. The least efficient of all refrigeration processes
✅ The correct answer is option B.
Which of the following exemplifies an adiabatic process?
A. Melting of ice
B. Condensation of alcohol vapor
C. Sudden bursting of a cycle tube
D. Evaporation of water
✅ The correct answer is option C.