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 12 of 50

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Q111.
A first order reaction requires two equal sized CSTR. The conversion is

a.

less when they are connected in series.

b.

more when they are connected in series.

c.

more when they are connected in parallel.

d.

same whether they are connected in series or in parallel.

Discuss
Answer: (b).more when they are connected in series.
Q112.
Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (b).1
Q113.
Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?

a.

Time

b.

Useful volume of the tank

c.

Diameter of the reactor

d.

None of these

Discuss
Answer: (a).Time
Q114.
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a

a.

batch reactor is preferred over a single CSTR for high yield.

b.

tubular reactor is preferred over a single CSTR for high yield.

c.

both (a) and (b).

d.

single CSTR is the most suitable.

Discuss
Answer: (c).both (a) and (b).
Q115.
For a gaseous phase reaction, rate of reaction is equal to K. Cᴀ . Cʙ. If the volume of the reactor is suddenly reduced to 1/4th of its initial volume, then the rate of reaction compared to the original rate will be __________ times.

a.

8

b.

16

c.

1/8

d.

1/16

Discuss
Answer: (b).16
Q116.
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

a.

remain the same

b.

be halved

c.

also be. doubled

d.

become one fourth

Discuss
Answer: (a).remain the same
Q117.
The catalyst in a second order reversible reaction increases the rate of the forward reaction

a.

and decreases that of backward reaction.

b.

and backward reaction equally.

c.

only.

d.

to a greater extent than that of the backward reaction.

Discuss
Answer: (b).and backward reaction equally.
Q118.
Catalyst carriers

a.

have very high selectivity.

b.

increase the activity of a catalyst.

c.

provide large surface area with a small amount of active material.

d.

inhibit catalyst poisoning.

Discuss
Answer: (c).provide large surface area with a small amount of active material.
Q119.
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
Q120.
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).
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