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 21 of 50

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Q201.
Pick out the wrong statement.

a.

'Hold back' is defined as the fraction of material that stays longer than the mean residence time.

b.

Study of non-ideal flow reactor is done experimentally by stimulus-response technique.

c.

For studying a chemical reaction, it is desirable to monitor the reactants during initial stages and the products during the final stages of reaction.

d.

A batch reactor can not be used to study the kinetics of catalytic reaction.

Discuss
Answer: (d).A batch reactor can not be used to study the kinetics of catalytic reaction.
Q202.
Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.

a.

pore diffusion

b.

gas film

c.

chemical reaction

d.

none of these

Discuss
Answer: (a).pore diffusion
Q203.
The rate expression for a heterogenous catalytic reaction is given by, - rแด€ = K.Kแด€ Pแด€(1 + Kแด€.Pแด€ + Kส€.Pส€), where K is surface reaction rate constant and Kแด€ and Kส€ are absorption equilibrium constants of A and R respectively. If Kส€ Pส€ >> (1 + Kแด€ Pแด€), the apparent activation energy Eแด€ is equal to (given E is the activation energy for the reaction and ฮ”Hส€ and ฮ”Hแด€ are the activation energies of adsorption of R and A)

a.

E

b.

E + ฮ”Hแด€

c.

E + ฮ”Hแด€ - ฮ”Hส€)

d.

ฮ”Hแด€ + ฮ”Hส€

Discuss
Answer: (c).E + ฮ”Hแด€ - ฮ”Hส€)
Q204.
The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the

a.

space time for each parallel line is same.

b.

space time for parallel lines is different.

c.

larger reactors have more space time compared to smaller ones.

d.

none of these.

Discuss
Answer: (a).space time for each parallel line is same.
Q205.
A catalyst is said to be a negative catalyst, if it

a.

retards the rate of reaction.

b.

reduces the value of equilibrium constant.

c.

does not initiate the reaction.

d.

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

Discuss
Answer: (a).retards the rate of reaction.
Q206.
For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the 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: (c).chemical reaction
Q207.
Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene :95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether :2.5 kmole/hr. The reactions occuring can be represented by:

Cโ‚‚Hโ‚…OH โ†’ Cโ‚‚Hโ‚„ + Hโ‚‚O
2Cโ‚‚Hโ‚…OH โ†’ Cโ‚‚Hโ‚… - O - Cโ‚‚Hโ‚… + Hโ‚‚O

The percent conversion of ethanol in the reactor is

a.

100

b.

97.5

c.

95

d.

2.5

Discuss
Answer: (a).100
Q208.
Pick out the wrong statement.

a.

The integral method of analysing kinetic data is used when the data is scattered.

b.

The differential method of analysing kinetic data requires more accurate or larger amounts of data.

c.

When the reaction rate is independent of temperature, the reaction is said to be of zero order.

d.

The ratio of volumes of plug flow reactor to that of mixed reactor is always less than one for identical feed composition, flow rate, conversion and for all positive reaction orders.

Discuss
Answer: (c).When the reaction rate is independent of temperature, the reaction is said to be of zero order.
Q209.
A backmix reactor

a.

is same as plug-flow reactor.

b.

is same as ideal stirred tank reactor.

c.

employs mixing in axial direction only.

d.

is most suitable for gas phase reaction.

Discuss
Answer: (b).is same as ideal stirred tank reactor.
Q210.
Rate of a chemical reaction is not influenced by the

a.

catalyst

b.

temperature

c.

reactants concentration

d.

number of molecules of reactants taking part in a reaction

Discuss
Answer: (d).number of molecules of reactants taking part in a reaction
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