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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

Slurry reactors are characterised by the_________________?
A Lack of intraparticle diffusion resistance
B Presence of two mobile phases
C Both A. and B.
D Neither A. nor B.
Correct Answer: Both A. and B.
consecutive reaction, as shown in the bellow figure, is characterised by __________________?
A
B Maxima in the concentration of B
C Maxima in the concentration of C
D High exothermicity
Correct Answer: Maxima in the concentration of B
A multiple reaction may be classified as a ________________ reaction?
A Consecutive or side
B Parallel or side
C Mixed
D All A., B. and C.
Correct Answer: All A., B. and C.
Molecularity of a reaction__________________?
A Is always equal to the overall order of reaction
B May not be equal to the order of reaction
C Can’t have a fractional value
D Both B. and C.
Correct Answer: Both B. and C.
A balanced chemical reaction equation conforms to the law of________________?
A Conservation of mass
B Avogadro’s hypothesis
C Gaseous volumes
D None of these
Correct Answer: Conservation of mass
Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in ___________________?
A Blood
B Saliva
C Intestine
D Gland
Correct Answer: Saliva
Which of the following chemical reactions will be favoured by low pressure ?
A 2HI ⇌ H2 + I2
B N2O2 ⇌ 2NO2
C N2 + O2 ⇌ 2NO
D None of these
Correct Answer: N2O2 ⇌ 2NO2
An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is_________________?
A 0.80
B 1.33
C 1.60
D 2.67
Correct Answer: 1.60
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
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