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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.

In an exothermic chemical reaction, the reactants compared to the products have__________________?

A Higher temperature

B More energy

C Less energy

D Same energy

Review Detailed Answer

Correct Answer: More energy

BET apparatus_______________________?

A Measures the catalyst surface area directly

B Operates at very high pressure

C Is made entirely of stainless steel

D None of these

Review Detailed Answer

Correct Answer: None of these

The half life period of a first order reaction is given by (where, K = rate constant) ?

A 1.5 K

B 2.5 K

C 0.693/K

D 6.93 K

Review Detailed Answer

Correct Answer: 0.693/K

The reason why a catalyst increases the rate of reaction is that, it______________?

A Decreases the energy barrier for reaction

B Increases the activation energy

C Decreases the molecular collision diameter

D None of these

Review Detailed Answer

Correct Answer: Decreases the energy barrier for reaction

A catalyst______________________?

A Initiates a reaction

B Lowers the activation energy of reacting molecules

C Is capable of reacting with any one of the reactants

D Cannot be recovered chemically unchanged at the end of a chemical reaction

Review Detailed Answer

Correct Answer: Lowers the activation energy of reacting molecules

The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) → C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, KA, KB and KC are the equilibrium constants and is the rate constant of the rate controlling step) ?

A k KA pApB / (1 + KApA + KBpB)

B k KAKB pApB / (1 + KApA + KBpB)

C k KAKB pApB / (1 + KApA + KBpB + KCpC)

D k KAKB pApB / (1 + KApA + KBpB + KCpC)2

Review Detailed Answer

Correct Answer: k KAKB pApB / (1 + KApA + KBpB + KCpC)

Reaction rate equation for the bellow figure reaction, If S at is present in large excess, what is the order of this reaction ?

A Zero

B One

C Two

D Three

Review Detailed Answer

Correct Answer: One

In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the_________________?

A Total pressure of the system

B Volume of the reactor

C Temperature

D Initial concentration of N2 and H2

Review Detailed Answer

Correct Answer: Temperature

For a heterogeneous catalytic reaction____________________?

A Free energy of activation is lowered in the presence of catalyst, which remains unchanged at

B A relatively small amount of catalyst can cause the conversion of large amount of reactants

C The catalyst does not form an intermediate complex with the reactant

D The surface of the catalyst does not play an important role during reaction

Review Detailed Answer

Correct Answer: Free energy of activation is lowered in the presence of catalyst, which remains unchanged at

For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is____________________?

A 2

B 4

C 11

D 22

Review Detailed Answer

Correct Answer: 11

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

In an exothermic chemical reaction, the reactants compared to the products have__________________?

BET apparatus_______________________?

The half life period of a first order reaction is given by (where, K = rate constant) ?

The reason why a catalyst increases the rate of reaction is that, it______________?

A catalyst______________________?

Reaction rate equation for the bellow figure reaction, If S at is present in large excess, what is the order of this reaction ?

In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the_________________?

For a heterogeneous catalytic reaction____________________?

For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is____________________?