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 30 of 50

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Q291.
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.
Q292.
Promoter is added to the catalyst to improve its

a.

porosity

b.

sensitivity

c.

surface area

d.

none of these

Discuss
Answer: (b).sensitivity
Q293.
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.
Q294.
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
Q295.
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
Q296.
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
Q297.
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.
Q298.
The extent of a reaction is

a.

different for reactants and products.

b.

dimensionless.

c.

depends on the stoichiometric co-efficient.

d.

all of the above.

Discuss
Answer: (d).all of the above.
Q299.
Higher free energy of activation of a chemical reaction (at a given temperature) implies

a.

slower rate of reaction.

b.

higher rate of reaction.

c.

higher equilibrium conversion.

d.

both (b) and (c).

Discuss
Answer: (a).slower rate of reaction.
Q300.
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

a.

CaO is not dissociated.

b.

CO₂ escapes continuously.

c.

of high calcination temperature.

d.

CaO is more stable than CaCO₃.

Discuss
Answer: (b).CO₂ escapes continuously.
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