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 8 of 50

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Q71.
For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1 min⁻¹ . What will be the conversion for a PFR with a space velocity of 0.2 min⁻¹ ? Assume that all the other operating conditions are the same for CSTR and PFR.

a.

0.15

b.

0.30

c.

0.60

d.

0.90

Discuss
Answer: (c).0.60
Q72.
A high space velocity means that a given

a.

reaction can be accomplished with small reactor.

b.

conversion can be obtained with a high feed rate.

c.

both (a) and (b).

d.

none of these.

Discuss
Answer: (c).both (a) and (b).
Q73.
In flow reactors, the performance equations interrelate the rate of reaction to the

a.

feed rate.

b.

reactor volume,

c.

extent of reaction.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q74.
When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is

a.

> 1

b.

< 1

c.

1

d.

0

Discuss
Answer: (c).1
Q75.
In an ideal tubular-flow reactor

a.

there is no mixing in longitudinal direction.

b.

mixing takes place in radial direction.

c.

there is a uniform velocity across the radius.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q76.
At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

a.

1.6

b.

2

c.

2.24

d.

2.5

Discuss
Answer: (d).2.5
Q77.
__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.

a.

Gas film diffusion

b.

Ash diffusion

c.

Chemical reaction

d.

none of these

Discuss
Answer: (c).Chemical reaction
Q78.
An autothermal reactor is

a.

most suitable for a second order reaction.

b.

most suitable for a reversible reaction.

c.

completely self-supporting in its thermal energy requirements.

d.

isothermal in nature.

Discuss
Answer: (c).completely self-supporting in its thermal energy requirements.
Q79.
The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst.

a.

increases

b.

decreases

c.

remains unaffected

d.

unpredictable from the data

Discuss
Answer: (c).remains unaffected
Q80.
The rate constant of a chemical reaction increases by increasing the

a.

temperature

b.

pressure

c.

reactant's concentration

d.

none of these

Discuss
Answer: (a).temperature
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