A. Mole fraction
B. Activity
C. Pressure
D. Activity co-efficient
✅ The correct answer is option C.
Chemical Engineering MCQs
A refrigerator works on the principle of __________ law of thermodynamics.
A. Zeroth
B. First
C. Second
D. Third
✅ The correct answer is option C.
The thermodynamic law, PVy = constant, is not applicable in case of
A. Ideal compression of air
B. Free expansion of an ideal gas
C. Adiabatic expansion of steam in a turbine
D. Adiabatic compression of a perfect gas
✅ The correct answer is option B.
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.
Linde gas liquefaction process employs cooling
A. By throttling
B. By expansion in an engine
C. At constant pressure
D. None of these
✅ The correct answer is option A.
In any spontaneous process, the __________ free energy decreases.
A. Helmholtz
B. Gibbs
C. Both A & B
D. Neither A nor B
✅ The correct answer is option C.
The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.
A. Gibbs-Duhem
B. Van Laar
C. Gibbs-Helmholtz
D. Margules
✅ The correct answer is option A.
A system is said to be at equilibrium, if the entropy of the system has reached __________ value.
A. Minimum
B. Zero
C. Maximum
D. None of these
✅ The correct answer is option C.
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.
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D1 and D2 are I.D. of inner and outer pipes)
D2 – D1
none of these
✅ The correct answer is option A.