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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

Consider the ‘n’ th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?

A CA0 Vs t1/2

B ln CA0 Vs t1/2

C CA0 Vs ln t1/2

D ln CA0 Vs ln t1/2

Review Detailed Answer

Correct Answer: CA0 Vs ln t1/2

In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) ?

A A

B N

C A + N

D A – N

Review Detailed Answer

Correct Answer: A

A trickle bed reactor is the one, which_________________?

A Has altogether three streams either entering or leaving

B Processes three reactants at different flow rates

C Processes three reactants with same flow rate

D Employs all the three phases (i.e. solid, liquid and gas)

Review Detailed Answer

Correct Answer: Employs all the three phases (i.e. solid, liquid and gas)

The rate of reaction of a/an ______________ reaction is not affected by temperature rise ?

A Autocatalytic

B Photochemical

C Consecutive

D Zero order

Review Detailed Answer

Correct Answer: Photochemical

The energy balance equation over a tubular reactor under transient conditions is________________?

A An ordinary non-linear differential equation

B An algebraic differential equation

C A linear partial differential equation

D A non-linear partial differential equation

Review Detailed Answer

Correct Answer: A linear partial differential equation

Exothermic reactions are best carried out in ________________?

A A CSTR

B CSTR in series

C A plug flow reactor followed by CSTR

D CSTR followed by a plug flow reactor

Review Detailed Answer

Correct Answer: CSTR followed by a plug flow reactor

The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the__________________?

A Reaction is elementary with a molecularity of 2

B Molecularity of the reaction is 2, but the reaction may not be elementary

C Reaction may be elementary with molecularity of 2

D Reaction is elementary but the molecularity may not be 2

Review Detailed Answer

Correct Answer: Reaction is elementary with a molecularity of 2

Backmixing is most predominant in___________________?

A A well stirred batch reactor

B A plug-flow reactor

C A single CSTR

D CSTR’s connected in series

Review Detailed Answer

Correct Answer: A single CSTR

For the chemical reaction X → Y, it is observed that, on doubling the concentration of ‘X’, the reaction rate quadruples. If the reaction rate is proportional to Cx n, then what is the value of „n‟ ?

A 1/4

B 2

C 4

D 16

Review Detailed Answer

Correct Answer: 4

An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is ___________________?

A Maximum at the inlet of the reactor

B Maximum at the exit of the reactor

C Maximum at the centre of the reactor

D Constant throughout the reactor

Review Detailed Answer

Correct Answer: Maximum at the inlet of the reactor

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

Consider the ‘n’ th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?

In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) ?

A trickle bed reactor is the one, which_________________?

The rate of reaction of a/an ______________ reaction is not affected by temperature rise ?

The energy balance equation over a tubular reactor under transient conditions is________________?

Exothermic reactions are best carried out in ________________?

The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the__________________?

Backmixing is most predominant in___________________?

For the chemical reaction X → Y, it is observed that, on doubling the concentration of ‘X’, the reaction rate quadruples. If the reaction rate is proportional to Cx n, then what is the value of „n‟ ?

An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is ___________________?