3981. What is the degree of freedom for a system comprising liquid water equilibrium with its vapour?
A. 0
B. 1
C. 2
D. 3
✅ The correct answer is option B.
Chemical Engineering
Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.
3982. A gas performs the maximum work, when it expands
A. Non-uniformly
B. Adiabatically
C. Isobarically
D. Isothermally
✅ The correct answer is option C.
3983. There is a change in __________ during the phase transition.
A. Volume
B. Pressure
C. Temperature
D. All of the above
✅ The correct answer is option A.
3984. The kinetic energy of gas molecule is zero at
A. 0°C
B. 273°C
C. 100°C
D. -273°C
✅ The correct answer is option D.
3985. When dilute aqueous solutions of two salts are mixed, the process is associated with
A. Decrease in temperature
B. Increase in temperature
C. No change in temperature
D. Change in temperature which is a function of composition
✅ The correct answer is option B.
3986. One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one
A. Hour
B. Day
C. Minute
D. Second
✅ The correct answer is option B.
3987. First law of thermodynamics deals with the
A. Direction of energy transfer
B. Reversible processes only
C. Irreversible processes only
D. None of these
✅ The correct answer is option A.
3988. For an ideal liquid solution, which of the following is unity?
A. Activity
B. Fugacity
C. Activity co-efficient
D. Fugacity co-efficient
✅ The correct answer is option C.
3989. The compressibility factor of a gas is given by (where, V₁ = actual volume of the gas V₂ = gas volume predicted by ideal gas law )
A. V₁/V₂
B. V₂/V₁
C. V₁-V₂
D. V₁.V₂
✅ The correct answer is option A.
3990. The absolute entropy for all crystalline substances at absolute zero temperature is
A. Zero
B. Negative
C. More than zero
D. Indeterminate
✅ The correct answer is option A.