Chemical Reaction Engineering MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Chemical Reaction Engineering, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Chemical Reaction Engineering MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Chemical Reaction Engineering mcq questions that explore various aspects of Chemical Reaction Engineering problems. Each MCQ is crafted to challenge your understanding of Chemical Reaction Engineering principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Chemical Reaction Engineering MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Chemical Reaction Engineering. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Chemical Reaction Engineering knowledge to the test? Let's get started with our carefully curated MCQs!

Chemical Reaction Engineering MCQs | Page 2 of 50

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Q11.
Three plug flow reactors (PFR's) of 4, 5 & 6 m³ volumes are arranged in two branches as shown below in the figure.
If the total feed rate is 300 tons/hr, then for the same conversion in each branch, the feed rate through branch II should be __________ tons/hr.

a.

100

b.

150

c.

200

d.

225

Discuss
Answer: (a).100
Q12.
A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (kโ‚‘ff) is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q13.
If Cแด€ is the quantity of reactants initially present, the quantity left after 'n' half periods will be equal to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q14.
The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) โ†’ C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, Kแด€, Kส™ and Kc are the equilibrium constants and is the rate constant of the rate controlling step.)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q15.
The conversion for a second order, irreversible reaction (constant volume) given below, in batch mode is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q16.
A first order homogeneous reaction of the type X โ†’ Y โ†’ Z (consecutive reaction) is carried out in a CSTR. Which of the following curves respectively show the variation of the concentration of X, Y and Z with time?

a.

I, II, III

b.

III, II, I

c.

III, I, II

d.

II, III, I

Discuss
Answer: (b).III, II, I
Q17.
In a chemical reaction given below , it is observed that the
(i) rate of formation of 'P' is doubled on doubling the concentration of 'X'.
(ii) rate of formation of 'P' is quadrupled on doubling the concentration of 'Y'.
(iii) doubling the concentration of 'Z' does not affect the rate of formation of 'P'.
What is the order of the above chemical reaction?

a.

Zeroth order

b.

First order

c.

Second order

d.

Third order

Discuss
Answer: (d).Third order
Q18.
Transition state theory relates the above quantities as

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q19.
For a first order reaction carried out in a plug flow reactor, the space time is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q20.
Second order consecutive irreversible reactions given below were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (kโ‚/kโ‚‚)?

a.

1/4

b.

1/2

c.

2

d.

4

Discuss
Answer: (a).1/4
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