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 7 of 50

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Q61.
The first order series reaction given below, is conducted in a batch reactor. The initial concentrations of A, B and C (Cแด€โ‚€, Cส™โ‚€, Ccโ‚€ respectively) are all non-zero. The variation of Cส™ with reaction time will not show a maximum, if

a.

kโ‚‚ Cส™โ‚€ > kโ‚ Cแด€โ‚€

b.

k Cแด€โ‚€ > kโ‚‚.Cส™โ‚€

c.

Cส™โ‚€ > Cแด€โ‚€

d.

Cแด€โ‚€ > Cส™โ‚€

Discuss
Answer: (a).kโ‚‚ Cส™โ‚€ > kโ‚ Cแด€โ‚€
Q62.
Effectiveness factor (E) of a catalyst pellet is defined as below. Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)

a.

tan hT/T

b.

tan T/T

c.

tan hT/tan T

d.

none of these

Discuss
Answer: (a).tan hT/T
Q63.
The mean conversion in the exit stream, for a second order, liquid phase reaction in a non-ideal flow reactor is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q64.
Concentration of the limiting reactant (with initial concentration of a moles/litre) after time t is (a-x). Then 't' for a first order reaction is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q65.
Which of the following holds good for an elementary reaction given below:

a.

The rate of disappearance of 'Y' is equal to the rate of appearance of 'Z'.

b.

The rate of disappearance of 'Y' is equal to the rate of disappearance of 'X'.

c.

Three times the rate of disappearance of 'X' is equal to the rate of appearance of 'Z'.

d.

The rate of disappearance of 'X' is equal to the rate of appearance of 'Z'.

Discuss
Answer: (c).Three times the rate of disappearance of 'X' is equal to the rate of appearance of 'Z'.
Q66.
The following gas phase reaction is taking place in a plug flow reactor.
A stoichiometric mixture of A and B at 300 K is fed to the reactor. At 1 m along the length of the reactor, the temperature is 360 K. The pressure drop is negligible and an ideal gas behaviour can be assumed. Identify the correct expression relating the concentration of A at the inlet (Cแด€โ‚€), concentration of A at 1m (Cแด€) and the corresponding conversion of A (X).

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q67.
The effectiveness factor for large value of Thiele modulus (Lโˆš(K/Dโ‚)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, Dโ‚ = diffusion co-efficient, cm²/second)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q68.
Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes.

a.

Strong pore diffusion control and mass transfer not controlling.

b.

Both pore diffusion and mass transfer not controlling.

c.

Both pore diffusion and mass transfer controlling.

d.

Mass transfer controlling.

Discuss
Answer: (a).Strong pore diffusion control and mass transfer not controlling.
Q69.
For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.

a.

physical

b.

chemical

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).chemical
Q70.
Pick out the correct statement.

a.

In catalytic reactions, the catalyst reacts with the reactants.

b.

A catalyst initiates a chemical reaction.

c.

A catalyst lowers the activation energy of the reacting molecules.

d.

A catalyst can not be recovered chemi cally unchanged at the end of the chemical reaction.

Discuss
Answer: (c).A catalyst lowers the activation energy of the reacting molecules.
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