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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

Pick out the wrong statement ?
A In a multistep reaction, the slowest step is the rate determining step
B In general, the rate of a reaction becomes triple for every 10°C rise in temperature
C Slow chemical reactions have generally high values of activation energy
D Molecularity of a reaction cannot be zero but the order of a reaction can be zero
Correct Answer: In general, the rate of a reaction becomes triple for every 10°C rise in temperature
The performance of a cascade of CSTR’s can be improved by adding__________________?
A A P.F. reactor in series
B A P.F. reactor in parallel
C More CSTR’s in series
D More CSTR’s in parallel
Correct Answer: More CSTR’s in series
According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction _________________?
A k ∝ √T
B k ∝ e-E/RT
C k ∝ T e-E/RT
D None of these
Correct Answer: k ∝ e-E/RT
When the reaction is dominated by intraparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as ________________?
A nD = (n + 1)/2
B nD = n/2
C nD = n + 1
D None of these
Correct Answer: nD = (n + 1)/2
Sometimes, batch process is preferred over continuous process, when the product___________________?
A Quality & yield cannot be achieved in continuous processes, because of long residence time
B Sales demand is fluctuating
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length ?
A Decreases
B Increases
C Is at the highest allowable temperature throughout
D First increases and then decreases
Correct Answer: Is at the highest allowable temperature throughout
A batch reactor is_______________?
A Suitable for gas-phase reactions on commercial scale
B Suitable for liquid phase reactions involving small production rate
C Least expensive to operate for a given rate
D Most suitable for very large production rate
Correct Answer: Suitable for liquid phase reactions involving small production rate
Radioactive decay follows ______________ order kinetics?
A First
B Second
C Third
D Zero
Correct Answer: First
The single parameter model proposed for describing non-ideal flow is the ____________ model?
A Tank in series
B Dispersion
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
Photochemical reaction rate does not depend significantly on temperature, because____________________?
A It is a reversible reaction
B It is an exothermic reaction
C The energy of reacting molecules exceeds the activation energy by absorption of light
D None of these
Correct Answer: The energy of reacting molecules exceeds the activation energy by absorption of light
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