A. Only F decreases
B. Only A decreases
C. Both F and A decreases
D. Both F and A increase
✅ The correct answer is option C.
Chemical Engineering MCQs
The adiabatic throttling process of a perfect gas is one of constant enthalpy
A. In which there is a temperature drop
B. Which is exemplified by a non-steady flow expansion
C. Which can be performed in a pipe with a constriction
D. In which there is an increase in temperature
✅ The correct answer is option C.
The number of degree of freedom for an azeotropic mixture of ethanol and water in vapour-liquid equilibrium, is
A. 3
B. 1
C. 2
D. 0
✅ The correct answer is option B.
The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is
A. R loge 4
B. R log10 4
C. Cv log10 4
D. Cv loge 4
✅ The correct answer is option A.
One ton of refrigeration capacity is equivalent to the heat removal rate of
A. 50 k cal/hr
B. 200 BTU/hr
C. 200 BTU/minute
D. 200 BTU/day
✅ The correct answer is option C.
In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when
A. N = y = 1.4
B. N = 0
C. N = 1
D. N = 1.66
✅ The correct answer is option C.
The internal energy of an ideal gas is a function of its __________ only.
A. Molecular size
B. Volume
C. Pressure
D. Temperature
✅ The correct answer is option D.
If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them. This is __________ law.
A. Hess’s
B. Kirchoff’s
C. Lavoisier and Laplace
D. None of these
✅ The correct answer is option A.
Consider the reaction, C + O₂ ⇋ CO₂ ;ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO₂ → C + O₂?
A. -94 kcal
B. + 94 kcal
C. > 94 kcal
D. < -94 kcal
✅ The correct answer is option B.
Which of the following identities can be most easily used to verify steam table data for superheated steam.
A. (∂T/∂V)S = (∂p/∂S)V
B. (∂T/∂P)S = (∂V/∂S)P
C. (∂P/∂T)V = (∂S/∂V)T
D. (∂V/∂T)P = -(∂S/∂P)T
✅ The correct answer is option D.