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 33 of 50

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Q321.
Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ?

a.

Langmuir's assumption applies to every adsorbed layer.

b.

There is no dynamic equilibrium between successive layer.

c.

The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process.

d.

none of these.

Discuss
Answer: (b).There is no dynamic equilibrium between successive layer.
Q322.
The sequence in which three CSTR's of volumes 5, 10 and 15 m³ will be connected in series to obtain the maximum production in a second order irreversible reaction is

a.

15, 10, 5

b.

5, 10, 15

c.

10, 5, 15

d.

10, 15, 5

Discuss
Answer: (a).15, 10, 5
Q323.
With increase in temperature, the equilibrium conversion of a reversible exothermic reaction

a.

decreases

b.

increases

c.

remains unaffected

d.

decreases linearily with temperature

Discuss
Answer: (a).decreases
Q324.
In a CSTR __________ varies with time.

a.

reaction rate

b.

concentration

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (d).neither (a) nor (b)
Q325.
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
Q326.
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.
Q327.
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.
Q328.
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
Q329.
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
Q330.
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
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