A. 0
B. ∞
C. 50
D. 100
✅ The correct answer is option B.
Chemical Engineering MCQs
Specific __________ does not change during phase change at constant temperature and pressure.
A. Entropy
B. Gibbs energy
C. Internal energy
D. Enthalpy
✅ The correct answer is option B.
Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process.
A. Equilibrium
B. Adiabatic
C. Steady
D. Unsteady
✅ The correct answer is option D.
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.
Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?
A. Freon
B. Liquid sulphur dioxide
C. Methyl chloride
D. Ammonia
✅ The correct answer is option A.
Free energy
A. Decreases in all spontaneous (or irreversible) processes
B. Change during a spontaneous process has a negative value
C. Remains unchanged in reversible processes carried at constant temperature and pressure
D. All of the above
✅ The correct answer is option D.
Work done in an adiabatic process between two states depends on the
A. Rate of heat transmission
B. Initial state only
C. End states only
D. None of these
✅ The correct answer is option C.
Ideal gas law is applicable at
A. Low T, low P
B. High T, high P
C. Low T, high P
D. High T, low P
✅ The correct answer is option D.
Duringthe phase transition, __________ changes.
A. Pressure
B. Volume
C. Temperature
D. All of the above
✅ The correct answer is option B.