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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is__________________?
A 1.572
B 1.9398
C 3.389
D 4.238
Correct Answer: 1.572
Which of the following is affected by the temperature ?
A Fugacity
B Activity co-efficient
C Free energy
D All A, B. & C
Correct Answer: All A, B. & C
In any spontaneous process, the ______________ free energy decreases ?
A Helmholtz
B Gibbs
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the________________?
A Steam to ethylene ratio
B Temperature
C Pressure
D None of these
Correct Answer: None of these
Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole. °K___________________?
A 0
B ∞
C 50
D 100
Correct Answer: ∞
Which of the following exemplifies an adiabatic process ?
A Melting of ice
B Condensation of alcohol vapor
C Sudden bursting of a cycle tube
D Evaporation of water
Correct Answer: Sudden bursting of a cycle tube
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
Correct Answer: V1/V2
Reduced pressure of a gas is the ratio of its__________________?
A Pressure to critical pressure
B Critical pressure to pressure
C Pressure to pseudocritical pressure
D Pseudocritical pressure to pressure
Correct Answer: Pressure to critical pressure
The freezing point of a liquid decreases when the pressure is increased, if the liquid ____________ while freezing?
A Contracts
B Expands
C Does not change in volume
D Either (A), B. or (C)
Correct Answer: Contracts
Melting of wax is accompanied with ______________ in entropy?
A Increase
B Decrease
C No change
D None of these
Correct Answer: Increase
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