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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.

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

The concentration of A in a first order reaction, A → B, decreases_____________________?

A Linearly with time

B Exponentially with time

C Very abruptly towards the end of the reaction

D Logarithmically with time

Review Detailed Answer

Correct Answer: Exponentially with time

Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about _______________ minutes?

A 3

B 4

C 6

D 10

Review Detailed Answer

Correct Answer: 4

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

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________________?

The concentration of A in a first order reaction, A → B, decreases_____________________?

Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about _______________ minutes?