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 36 of 50

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Q351.
The following gas phase reactions are carried out isothermally in a CSTR.

A โ†’ 2R ; rโ‚ = kโ‚pแด€ ;
kโ‚ = 20 mole/(sec.m³ bar)
A โ†’ 3S ; rโ‚‚ = kโ‚‚ pแด€ ;
kโ‚‚ = 40 mole/(sec.m³ .bar)

What is the maximum possible value of Fส€(mole/sec.) ?

a.

1/3

b.

1/2

c.

2/3

d.

2

Discuss
Answer: (c).2/3
Q352.
As the chemical reaction proceeds, the rate of reaction

a.

increases.

b.

decreases.

c.

remains same.

d.

may increase or decrease depending on the type of reaction.

Discuss
Answer: (b).decreases.
Q353.
Pick out the wrong statement.

a.

A catalyst does not alter the final position of equilibrium in a reversible reaction.

b.

A catalyst initiates a reaction.

c.

A catalyst is specific in reaction.

d.

A catalyst remains unchanged in chemical composition at the end the reaction.

Discuss
Answer: (b).A catalyst initiates a reaction.
Q354.
For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single

a.

CSTR of volume V

b.

PFR of volume V

c.

CSTR of volume V/X

d.

PFR of volume V/X

Discuss
Answer: (b).PFR of volume V
Q355.
Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.

a.

3

b.

4

c.

6

d.

8

Discuss
Answer: (b).4
Q356.
For a __________ order reaction, the units of rate constant and rate of reaction are the same.

a.

zero

b.

first

c.

second

d.

fractional

Discuss
Answer: (a).zero
Q357.
In case of staged packed bed reactors carrying out exothermic reaction, use

a.

high recycle for pure gas.

b.

plug flow for dilute liquid requiring no large preheating of feed.

c.

cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q358.
Vegetable oils are hydrogenated in a __________ reactor.

a.

slurry

b.

plug flow

c.

homogeneous catalytic

d.

none of these

Discuss
Answer: (a).slurry
Q359.
With the same reaction time, initial concentration and feed rate, the reaction 2A โ†’ B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be

a.

higher in P.F. reactor

b.

higher in CSTR

c.

same in both the reactors

d.

data insufficient; can't be predicted

Discuss
Answer: (a).higher in P.F. reactor
Q360.
For any reaction, we may write conversion as a function of

a.

time

b.

temperature

c.

concentration

d.

all (a), (b) & (c)

Discuss
Answer: (d).all (a), (b) & (c)
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