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 27 of 50

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Q261.
Half life period of a first order irreversible reaction A → B is

a.

k/2

b.

ln k/2

c.

ln 2/k

d.

ln 0.5/k

Discuss
Answer: (c).ln 2/k
Q262.
Which of the following fixes the volume of a batch reactor for a particular conversion and production rate ?

a.

Operating conditions (e.g. pressure and temperature)

b.

Rate constant

c.

Density of mixture

d.

None of these

Discuss
Answer: (c).Density of mixture
Q263.
Half life period of decomposition of a liquid 'A' by irreversible first order reaction is 12 minutes. The time required for 75% conversion of 'A' is __________ minutes.

a.

18

b.

24

c.

6

d.

12

Discuss
Answer: (b).24
Q264.
With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will

a.

increase

b.

decrease

c.

remain same

d.

data in insufficient; can't be predicted

Discuss
Answer: (a).increase
Q265.
In case of calcination of limestone, CaCO₃CaO + CO₂, the addition of more of CaO will result in __________ in the concentration of CO₂.

a.

no change

b.

increase

c.

decrease

d.

unpredictable from the data

Discuss
Answer: (a).no change
Q266.
The rate of a homogeneous reaction is a function of

a.

temperature and pressure only.

b.

temperature and composition only.

c.

pressure and composition only.

d.

all temperature, pressure and composition.

Discuss
Answer: (d).all temperature, pressure and composition.
Q267.
In the fluid catalytic cracker (FCC), the cracking reaction is __________ (A) and the regeneration is___(B) __________

a.

(A) exothermic (B) endothermic

b.

(A) exothermic (B) exothermic

c.

(A) endothermic (B) enodthermic

d.

(A) endothermic (B) exothermic

Discuss
Answer: (d).(A) endothermic (B) exothermic
Q268.
Pick out the correct statement.

a.

A catalyst does not change AH of the reaction.

b.

A catalyst changes the equilibrium point.

c.

Law of mass action was suggested by Le-Chatelier.

d.

The difference between the energy of reactants and that of the products is the activation energy.

Discuss
Answer: (a).A catalyst does not change AH of the reaction.
Q269.
Pick out the wrong statement.

a.

Autocatalytic reactions are exemplified by microbial fermentation reactions.

b.

The slowest step has the greatest influence on the overall reaction rate in case of an irreversible series reaction.

c.

The fractional conversion at any time is same for both the constant as well as the variable volume system in case of an irreversible unimolecular type first order reaction.

d.

Hydrolysis of ester in presence of alkali or acid is a zero order reaction.

Discuss
Answer: (d).Hydrolysis of ester in presence of alkali or acid is a zero order reaction.
Q270.
Pick out the wrong statement

a.

For the same conversion, the holding time required in a batch reactor, is always equal to the space time required in a PFR.

b.

Two mixed reactors of unequal size are available for producing a specified product, formed by a homogenous second order reaction. To achieve maximum production rate, the smaller reactor should be placed in series before the larger reactor.

c.

Arrehenius equation describing the effect of temperature on rate constant is given by, K = A.e^(-Ea/RT)

d.

The mechanism for the decomposition of CH₃CHO into CH₄ and CO in presence of I₂ is:

CH₃CHO +I₂ → CH₃I + HI + CO; slow
CH₃I + HI → CH₄ + I₂; fast

Then the rate of disappearance of CH₃CHO is equal to K.CCH₃I.CHI and acts as a catalyst.

Discuss
Answer: (d).The mechanism for the decomposition of CH₃CHO into CH₄ and CO in presence of I₂ is:

CH₃CHO +I₂ → CH₃I + HI + CO; slow
CH₃I + HI → CH₄ + I₂; fast

Then the rate of disappearance of CH₃CHO is equal to K.CCH₃I.CHI and acts as a catalyst.
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