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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.

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the ________________ diffusion?

A Film

B Ash layer

C Pore

D None of these

Review Detailed Answer

Correct Answer: Film

The order of a chemical reaction is__________________?

A An experimentally determined quantity

B Always equal to the total stoichiometric number of reactants

C Never fractional

D None of these

Review Detailed Answer

Correct Answer: An experimentally determined quantity

The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the_________________?

A Increased temperature reduces the activation energy

B Fraction of molecules having threshold energy increases

C Collision frequency increases

D Value of threshold energy decreases

Review Detailed Answer

Correct Answer: Fraction of molecules having threshold energy increases

In an ideal P.F.R. at steady state conditions ___________________?

A The composition of reactants remains constant along a flow path

B The conversion of the reactant varies from point to point along a flow path

C There is no lateral mixing of fluid

D There may be diffusion along the flow path

Review Detailed Answer

Correct Answer: The conversion of the reactant varies from point to point along a flow path

Promoter_____________________?

A Initiates a chemical reaction and is a catalyst by itself

B Alters the position of equilibrium in a reversible reaction

C Increases the number of active centres by increasing the unevenness of catalyst surface and by

D All A., B. and C.

Review Detailed Answer

Correct Answer: Increases the number of active centres by increasing the unevenness of catalyst surface and by

In the hydrodealkylation of toluene to benzene, the following reactions occur: C7H8 + H2 → C6H6 + CH4 2C6H6 ⇌ C12H10 + H2 Toluene and hydrogen are fed to a reactor in a molar ratio 1:5.80% of the toluene gets converted and the selectivity of benzene(defined as moles of benzene formed/moles of toluene converted) is 90%. The fractional conversion of hydrogen is_______________________?

A 0.16

B 0.144

C 0.152

D 0.136

Review Detailed Answer

Correct Answer: 0.144

Vegetable oils are hydrogenated in a _______________ reactor?

A Slurry

B Plug flow

C Homogeneous catalytic

D None of these

Review Detailed Answer

Correct Answer: Slurry

B.E.T. method of finding out surface area of a catalyst, uses the extension of _________________ isotherm?

A Langmuir

B Freundlich

C Tempkin

D None of these

Review Detailed Answer

Correct Answer: Langmuir

Half life period of a chemical reaction is proportional to CA0 -1, if the reaction is of _______________ order?

A First

B Zero

C Second

D Third

Review Detailed Answer

Correct Answer: Second

‘n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume________________?

A V/n

B V

C V.n

D 1/V

Review Detailed Answer

Correct Answer: V

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the ________________ diffusion?

The order of a chemical reaction is__________________?

The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the_________________?

In an ideal P.F.R. at steady state conditions ___________________?

Promoter_____________________?

Vegetable oils are hydrogenated in a _______________ reactor?

B.E.T. method of finding out surface area of a catalyst, uses the extension of _________________ isotherm?

Half life period of a chemical reaction is proportional to CA0 -1, if the reaction is of _______________ order?

‘n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume________________?