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 18 of 50

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Q171.
A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.

a.

less than

b.

equal to

c.

more than

d.

equal to or more than

Discuss
Answer: (d).equal to or more than
Q172.
A catalyst inhibitor

a.

lessens its selectivity.

b.

may be useful for suppressing undesirable side reactions.

c.

is added in small quantity during the catalyst manufacture itself.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q173.
In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO₂ to SO₃ is accomplished by a __________ reaction.

a.

non-catalytic homogeneous

b.

non-catalytic heterogeneous

c.

catalytic homogenous

d.

catalytic heterogeneous

Discuss
Answer: (c).catalytic homogenous
Q174.
If the rate of a chemical reaction becomes slower at a given temperature, then the

a.

initial concentration of the reactants remains constant.

b.

free energy of activation is lower.

c.

entropy changes.

d.

free energy of activation is higher.

Discuss
Answer: (d).free energy of activation is higher.
Q175.
The conversion Xᴀ and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line ?

a.

Xᴀ Vs τ

b.

Xᴀ Vs ln τ

c.

Xᴀ/(1 - Xᴀ) Vs τ

d.

Xᴀ(1 - Xᴀ) Vs τ

Discuss
Answer: (a).Xᴀ Vs τ
Q176.
The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K Cₓⁿ, the value of 'n' in this case will be

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (c).2
Q177.
The rate at which a chemical substance reacts is proportional to its

a.

active mass

b.

equivalent weight

c.

molecular weight

d.

none of these

Discuss
Answer: (a).active mass
Q178.
A plug-flow reactor is characterised by

a.

high capacity.

b.

presence of axial mixing.

c.

presence of lateral mixing.

d.

constant composition and temperature of reaction mixture.

Discuss
Answer: (c).presence of lateral mixing.
Q179.
For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

a.

τ and θ are always equal.

b.

τ = θ , when the fluid density changes in the reactor.

c.

τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant.

d.

τ = θ , for a non-isothermal reactor.

Discuss
Answer: (c).τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant.
Q180.
Space velocity

a.

describes the extensive operating characteristics of a tubular flow reactor.

b.

is the maximum feed rate pre unit volume of reactor for a given conversion.

c.

is a measure of the ease of the reaction.

d.

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

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