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 26 of 50

Discover more Topics under Basic Chemical Engineering

Q251.
In case of a P.F.R., there

a.

may be lateral mixing of fluid.

b.

should not be any mixing along the flow path.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q252.
For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance.

a.

film diffusion

b.

diffusion through ash layer

c.

chemical reaction

d.

either (a), (b) or (c)

Discuss
Answer: (b).diffusion through ash layer
Q253.
If ฮ”G (free energy change) for a chemical reaction is very large and negative, then the reaction is

a.

not feasible.

b.

just feasible.

c.

very much feasible.

d.

unpredictable as ฮ”G is no measure of feasibility of a reaction.

Discuss
Answer: (c).very much feasible.
Q254.
In a zero order reaction, reactants concentration does not change with time and the

a.

time for half change is half the time taken for completion of the reaction.

b.

time for half change is independent of the initial concentration.

c.

time for completion of the reaction is independent of the initial concentration.

d.

reaction rate is trebled when the initial concentration is trebled.

Discuss
Answer: (a).time for half change is half the time taken for completion of the reaction.
Q255.
Promoter is added to the catalyst to improve its

a.

porosity

b.

sensitivity

c.

surface area

d.

none of these

Discuss
Answer: (b).sensitivity
Q256.
An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will

a.

be more in CSTR than in PFR.

b.

be more in PFR than in CSTR.

c.

be same in both cases.

d.

depend on the temperature.

Discuss
Answer: (b).be more in PFR than in CSTR.
Q257.
When a high liquid hold up is required in a reactor for gas liquid reaction, use __________ coloumn.

a.

packed

b.

spray

c.

tray

d.

bubble

Discuss
Answer: (d).bubble
Q258.
In an exothermic reaction, the energy of the reacting substances as compared to that of products is

a.

more

b.

less

c.

same

d.

either (a) or (b), depends on order of reaction.

Discuss
Answer: (a).more
Q259.
For a tubular flow reactor with uniform concentration and temperature, the independent variable is

a.

time

b.

length

c.

diameter

d.

none of these

Discuss
Answer: (b).length
Q260.
Pick out the wrong statement.

a.

For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity.

b.

For an ideal mixed reactor at steady state, the exit stream has the same composition as fluid within the reactor and the space time is equivalent to holding time for constant density system.

c.

Plug flow reactor (PFR) is always smaller than mixed reactor for all positive reaction orders for a particular duty.

d.

Reaction rate does not decrease appreciably as the reaction proceeds in case of an autocatalytic reaction.

Discuss
Answer: (a).For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity.
Page 26 of 50