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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

For a homogeneous reaction of nth order, the dimension of the rate constant is given by_________________?
A 1/(time)n
B (Concentration)1 – n/(time)
C (Concentration)n – 1/(time)
D None of these
Correct Answer: (Concentration)1 – n/(time)
With increase in temperature, the rate constant obeying Arrhenius equation____________________?
A Increases
B Decreases
C Decreases exponentially
D Can either increase or decrease; depends on the frequency factor
Correct Answer: Decreases
The equilibrium constant ‘K’ of a chemical reaction depends on_________________?
A Temperature only
B Pressure only
C Temperature and pressure
D Ratio of reactants
Correct Answer: Temperature only
The exit age distribution of fluid leaving a vessel is used to know the__________________?
A Activation energies of a reaction
B Reaction mechanism
C Extent of non-ideal flow in the vessel
D None of these
Correct Answer: Extent of non-ideal flow in the vessel
Which of the following holds good for an elementary reaction as shown in the bellow figure ?
A The rate of disappearance of ‘Y’ is equal to the rate of appearance of ‘Z’
B The rate of disappearance of ‘Y’ is equal to the rate of disappearance of ‘X’
C Three times the rate of disappearance of ‘X’ is equal to the rate of appearance of ‘Z’
D The rate of disappearance of ‘X’ is equal to the rate of appearance of ‘Z’
Correct Answer: Three times the rate of disappearance of ‘X’ is equal to the rate of appearance of ‘Z’
Non-catalytic fluid-solid reactions are represented by _______________ model?
A Continuous reaction
B Unreacted core
C Both A. and B.
D Neither A. and B.
Correct Answer: Both A. and B.
In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffected by pressure changes ?
A 2O3 ⇌ 3O2
B N2 + O2 ⇌ 2NO
C 2NO2 ⇌ N2O4
D 2SO2 + O2 ⇌ 2SO3
Correct Answer: N2 + O2 ⇌ 2NO
For all positive reaction orders for a particular duty ?
A Mixed reactor is always larger than the plug-flow reactor
B Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order
C Reactor size is independent of the type of flow
D Density variation during reaction affects design
Correct Answer: Mixed reactor is always larger than the plug-flow reactor
What is the value of ‘n’ if the reaction rate of the chemical reaction A → B, is proportional to CA n and it is found that the reaction rate triples, when the concentration of ‘A’ is increased 9 times ?
A 1/2
B 1/3
C 1/9
D 3
Correct Answer: 1/2
The exit age distribution curve E(t) for an ideal CSTR with the average residence time, η, is given by__________________?
A e-t/η
B e-t/η/η
C 1 – e-t/η
D 1 – (e-t/η/η)
Correct Answer: e-t/η
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