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!

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Chemical Reaction Engineering MCQs | Page 47 of 50

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Q461.
Pick out the wrong statement.

a.

In a first order reaction, A β†’ products; the reaction becomes slower as it proceeds, because the concentration of A decreases and the rate is proportional to the concentration of A.

b.

Transition state theory approaches the problem of calculating reaction rates by concentrating on the idea of activated complexes.

c.

According to the penetration theory, the mass transfer co-efficient decreases, if the exposure time of an eddy to the solute decreases.

d.

If the rate of an irreversible reaction, A + B β†’ 2C is k.Cα΄€.CΚ™, then the reaction is always elementary.

Discuss
Answer: (c).According to the penetration theory, the mass transfer co-efficient decreases, if the exposure time of an eddy to the solute decreases.
Q462.
Inversion of cane sugar is an example of

a.

unimolecular reaction with first order.

b.

bimolecular reaction with second order.

c.

bimolecular reaction with first order.

d.

unimolecular reaction with second order.

Discuss
Answer: (c).bimolecular reaction with first order.
Q463.
Pick out the correct statement.

a.

A catalyst speeds up the forward reaction but slows shown the reverse reaction.

b.

Addition of catalyst changes the equilibrium constant.

c.

Pressure changes do not change the equilibrium concentrations.

d.

The composition of equilibrium is changed by catalyst.

Discuss
Answer: (c).Pressure changes do not change the equilibrium concentrations.
Q464.
In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffacted by pressure changes ?

a.

2O₃ ↔ 3Oβ‚‚

b.

Nβ‚‚ + Oβ‚‚ ↔ 2NO

c.

2NOβ‚‚ ↔ Nβ‚‚Oβ‚„

d.

2SOβ‚‚ + Oβ‚‚ ↔ 2SO₃

Discuss
Answer: (b).Nβ‚‚ + Oβ‚‚ ↔ 2NO
Q465.
Integral method for analysing the kinetic data is used

a.

when the data are scattered.

b.

for testing specific mechanisms with simple rate expressions.

c.

both (a) and (b).

d.

none of these.

Discuss
Answer: (c).both (a) and (b).
Q466.
A first order reaction A β†’ B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by

a.

diffusion within the pellet.

b.

reaction.

c.

external mass transfer.

d.

none of the above.

Discuss
Answer: (a).diffusion within the pellet.
Q467.
The rate equation for the reaction represented by below equation, is given by - rβ‚“ = K₁ . Cβ‚“/(1 + Kβ‚‚ Cβ‚“). At high value of Cβ‚“ (i.e.., Kβ‚‚Cβ‚“ > > 1), the order of the reaction and the rate constant are respectively

a.

zero order & K₁/Kβ‚‚

b.

zero order & K₁

c.

first order & K₁

d.

first order & K₁/Kβ‚‚

Discuss
Answer: (a).zero order & K₁/Kβ‚‚
Q468.
For a __________ order chemical reaction given below, the half life period is independent of the initial concentration of the reactant A.

a.

zero

b.

first

c.

second

d.

third

Discuss
Answer: (b).first
Q469.
The rate expression for the gaseous phase reaction, CO + 2Hβ‚‚ ↔ CH₃OH, is given below. Which of the following is not possible ?

a.

Ξ± = 1, Ξ² = 1, Ξ³ =1

b.

Ξ± = 1, Ξ² = 2, Ξ³ = 1

c.

Ξ± = 1/3, Ξ² = 2/3, Ξ³ = 1/3

d.

Ξ± = 1/2, Ξ² = 1, Ξ³ = 1/2

Discuss
Answer: (a).Ξ± = 1, Ξ² = 1, Ξ³ =1
Q470.
The exit age distribution curve E(t) for an ideal CSTR with the average residence time, Ο„, is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
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