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.

When a catalyst increases the rate of forward reaction, the value of rate constant__________________?

A Increases

B Decreases

C Remain same

D Becomes infinite

Review Detailed Answer

Correct Answer: Increases

For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a _________________ reactor?

A Stirred tank

B Tubular flow

C Batch

D Fixed bed

Review Detailed Answer

Correct Answer: Stirred tank

For a gaseous phase reaction, rate of reaction is equal to K. CA . CB. If the volume of the reactor is suddenly reduced to 1/4th of its initial volume, then the rate of reaction compared to the original rate will be ______________ times?

A 8

B 16

C 1/8

D 1/16

Review Detailed Answer

Correct Answer: 16

The effect of increasing pressure on the gaseous equilibrium of the reaction 2X + 3Y ⇌ 3X + 2Y indicates that____________________?

A Pressure has no effect

B Backward reaction is favoured

C Forward reaction is favoured

D None of these

Review Detailed Answer

Correct Answer: Pressure has no effect

Signal normally used to study non-ideal flow by stimulus response technique is _______________ input?

A Pulse

B Step

C Both A. & B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Both A. & B.

A high space velocity means that a given__________________?

A Reaction can be accomplished with small reactor

B Conversion can be obtained with a high feed rate

C Both A. and B.

D None of these

Review Detailed Answer

Correct Answer: Both A. and B.

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenius law is used. What will be this ratio, if transition state theory is used with the same value of „E/R‟ ?

A 1.6

B 2

C 2.24

D 2.5

Review Detailed Answer

Correct Answer: 2

Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as_________________?

A DE = DM + DK

B 1/DE = 1/DN + DK

C DE = DM . DE

D DE = DN/DE

Review Detailed Answer

Correct Answer: 1/DE = 1/DN + DK

Which of the following is not a chemical step in a fluid solid catalytic reaction ?

A Surface chemical reaction

B Adsorption

C Desorption

D None of these

Review Detailed Answer

Correct Answer: None of these

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will________________?

A Remain the same

B Be halved

C Also be doubled

D Become one fourth

Review Detailed Answer

Correct Answer: Remain the same

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

When a catalyst increases the rate of forward reaction, the value of rate constant__________________?

For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a _________________ reactor?

For a gaseous phase reaction, rate of reaction is equal to K. CA . CB. If the volume of the reactor is suddenly reduced to 1/4th of its initial volume, then the rate of reaction compared to the original rate will be ______________ times?

The effect of increasing pressure on the gaseous equilibrium of the reaction 2X + 3Y ⇌ 3X + 2Y indicates that____________________?

Signal normally used to study non-ideal flow by stimulus response technique is _______________ input?

A high space velocity means that a given__________________?

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenius law is used. What will be this ratio, if transition state theory is used with the same value of „E/R‟ ?

Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as_________________?

Which of the following is not a chemical step in a fluid solid catalytic reaction ?

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will________________?