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 23 of 50

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Q221.
Pick out the wrong statement.

a.

Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value & chemical agents, is maximum at a temperature of about 45°C.

b.

Most of the enzyme catalysed reactions involve at least two substrates.

c.

Enzymes help in increasing the activation energy of the reaction.

d.

Equilibrium concentrations in enzyme catalysed reactions can be calculated by using the thermodynamic properties of substrates & products.

Discuss
Answer: (c).Enzymes help in increasing the activation energy of the reaction.
Q222.
There is no correspondence between stoichiometry and the rate equation in case of a/an __________ reaction.

a.

elementary

b.

multiple

c.

autocatalytic

d.

non-elementary

Discuss
Answer: (d).non-elementary
Q223.
A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?

a.

Inner catalyst core of radius R/8 does not participate in reaction.

b.

Inner catalyst core of radius R/2 does not participate in reaction.

c.

Inner catalyst core of radius 7R/8 does not participate in reaction.

d.

Effectiveness factor for a zero order reaction can not be 7/8 as it must always be 1.

Discuss
Answer: (a).Inner catalyst core of radius R/8 does not participate in reaction.
Q224.
Which of the following is used for calcination of limestone and dolomite in industrial practice ?

a.

Fluidised bed reactor

b.

Moving bed reactor

c.

Fixed bed reactor

d.

None of these

Discuss
Answer: (b).Moving bed reactor
Q225.
The half life period of a first order reaction is given by (where, K = rate constant. )

a.

1.5 K

b.

2.5 K

c.

0.693/K

d.

6.93 K

Discuss
Answer: (c).0.693/K
Q226.
Half life period of a chemical reaction is

a.

the time required to reduce the concentration of the reacting substance to half its initial value.

b.

half of the space time of a reaction.

c.

half of the residence time of a reaction.

d.

none of these

Discuss
Answer: (a).the time required to reduce the concentration of the reacting substance to half its initial value.
Q227.
In the gaseous phase ammonia formation reaction (N₂ + 3H₂ ↔ 2NH₃), the value of the equilibrium constant depends on the

a.

total pressure of the system.

b.

volume of the reactor.

c.

temperature.

d.

initial concentration of N₂ and H₂.

Discuss
Answer: (c).temperature.
Q228.
Which of the following is a controlling factor in very fast heterogeneous reaction ?

a.

Heat and mass transfer effects

b.

Pressure

c.

Temperature

d.

Composition of reactant

Discuss
Answer: (a).Heat and mass transfer effects
Q229.
Enzymes are destroyed, when the

a.

temperature is very high.

b.

reactant's concentration is very high.

c.

reactant's concentration is very low.

d.

reaction rate is independent of the reactant's concentration.

Discuss
Answer: (a).temperature is very high.
Q230.
For an autocatalytic reactor, the suitable reactor set up is

a.

P.F. reactors in series.

b.

CSTR in series.

c.

CSTR followed by P.F. reactor.

d.

P.F. reactor followed by CSTR.

Discuss
Answer: (c).CSTR followed by P.F. reactor.
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