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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

The reactions of high molecularity are rare, because________________?
A Of very large activation energy of many bodies
B Of low probability of many body collisions
C Many body collisions are not favoured energetically
D Of requirement of very large concentration for such reactions
Correct Answer: Of low probability of many body collisions
The role of a catalyst in a chemical reaction is to change the__________________?
A Equilibrium constant
B Activation energy
C Final products
D Heat of reaction
Correct Answer: Activation energy
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
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