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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.

Catalyst carriers___________________?

A Have very high selectivity

B Increase the activity of a catalyst

C Provide large surface area with a small amount of active material

D Inhibit catalyst poisoning

Review Detailed Answer

Correct Answer: Provide large surface area with a small amount of active material

Rate determining step in a reaction consisting of a number of steps in series is the ______________ step?

A Fastest

B Slowest

C Intermediate

D Data insufficient; can’t be predicted

Review Detailed Answer

Correct Answer: Slowest

____________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction ?

A Gas film diffusion

B Ash diffusion

C Chemical reaction

D None of these

Review Detailed Answer

Correct Answer: Chemical reaction

If in the gaseous phase reaction, N2O4 ⇌ 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be___________________?

A (1 + x)

B (1 – x)

C (1 + x)2

D (1 – x)2

Review Detailed Answer

Correct Answer: (1 + x)

The catalyst in a second order reversible reaction increases the rate of the forward reaction___________________?

A And decreases that of backward reaction

B And backward reaction equally

C Only

D To a greater extent than that of the backward reaction

Review Detailed Answer

Correct Answer: And backward reaction equally

The rate constant of a first order reaction depends on the ________________?

A Concentration of the reactant

B Temperature

C Concentration of the product

D Time

Review Detailed Answer

Correct Answer: Temperature

The units of frequency factor in Arrhenius equation_________________?

A Are the same as those of the rate constant

B Depend on the order of the reaction

C Depend on temperature, pressure etc. of the reaction

D Are cycles per unit time

Review Detailed Answer

Correct Answer: Are the same as those of the rate constant

Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?

A 0

B 1

C 2

D 3

Review Detailed Answer

Correct Answer: 1

A catalyst in a chemical reaction _______________ free energy change in the reaction?

A Increases

B Decreases

C Either A. or B.; depends on the type of catalyst

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Either A. or B.; depends on the type of catalyst

The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is________________?

A ∞

B 0

C 1

D > 1

Review Detailed Answer

Correct Answer: 1

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Catalyst carriers___________________?

Rate determining step in a reaction consisting of a number of steps in series is the ______________ step?

____________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction ?

If in the gaseous phase reaction, N2O4 ⇌ 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be___________________?

The catalyst in a second order reversible reaction increases the rate of the forward reaction___________________?

The rate constant of a first order reaction depends on the ________________?

The units of frequency factor in Arrhenius equation_________________?

A catalyst in a chemical reaction _______________ free energy change in the reaction?

The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is________________?