A. Constant volume
B. Polytropic
C. Adiabatic
D. Constant pressure
✅ The correct answer is option A.
Thermodynamics MCQs
The expression, nCv(T₂ – T₁), is for the __________ of an ideal gas.
A. Work done under adiabatic condition
B. Co-efficient of thermal expansion
C. Compressibility
D. None of these
✅ The correct answer is option A.
At absolute zero temperature, all substances have the same
A. Heat capacity
B. Crystalline structure
C. Entropy
D. None of these
✅ The correct answer is option A.
Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.
A. Less than
B. Same as
C. More than
D. Half
✅ The correct answer is option A.
Which of the following is not affected by temperature changes?
A. Fugacity
B. Activity co-efficient
C. Free energy
D. None of these
✅ The correct answer is option D.
The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is
A. -2 RT ln 0.5
B. -RT ln 0.5
C. 0.5 RT
D. 2 RT
✅ The correct answer is option B.
The quantitative effect of temperature on chemical equilibrium is given by the
A. Vant-Hoff equation
B. Le-Chatelier’s principle
C. Arhenius equation
D. None of these
✅ The correct answer is option A.
Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants)
A. (atm)Δx, when Δx is negative
B. (atm)Δx, when Δx is positive
C. Dimensionless, when Δx = 0
D. (atm)Δx2, when Δx > 0
✅ The correct answer is option D.
Throttling process is a/an __________ process.
A. Reversible and isothermal
B. Irreversible and constant enthalpy
C. Reversible and constant entropy
D. Reversible and constant enthalpy
✅ The correct answer is option B.
The internal energy of a gas obeying P (V – b) RT (where, b is a positive constant and has a constant Cv), depends upon its
A. Pressure
B. Volume
C. Temperature
D. All of the above
✅ The correct answer is option C.