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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 third law of thermodynamics states that the__________________?

A Heat capacity of a crystalline solid is zero at absolute zero temperature

B Heat transfer from low temperature to high temperature source is not possible without external

C Gases having same reduced properties behaves similarly

D None of these

Review Detailed Answer

Correct Answer: Heat capacity of a crystalline solid is zero at absolute zero temperature

Which of the following identities can be most easily used to verify steam table data for superheated steam ?

A (∂T/∂V)S = (∂p/∂S)V

B (∂T/∂P)S = (∂V/∂S)P

C (∂P/∂T)V = (∂S/∂V)T

D (∂V/∂T)P = -(∂S/∂P)T

Review Detailed Answer

Correct Answer: (∂V/∂T)P = -(∂S/∂P)T

In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________?

A Enhanced COP

B Decreased COP

C No change in the value of COP

D Increased or decreased COP; depending upon the type of refrigerant

Review Detailed Answer

Correct Answer: Enhanced COP

“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?

A Third law of thermodynamics

B Second law of thermodynamics

C Nernst heat theorem

D Maxwell’s relations

Review Detailed Answer

Correct Answer: Third law of thermodynamics

On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?

A (∂P/∂V)S = (∂P/∂V)T

B (∂P/∂V)S = [(∂P/∂V)T]Y

C (∂P/∂V)S = y(∂P/∂V)T

D (∂P/∂V)S = 1/y(∂P/∂V)T

Review Detailed Answer

Correct Answer: (∂P/∂V)S = y(∂P/∂V)T

In the reaction, C + O2 → CO2; ΔH = – 94 kcal. What is the heat content (enthalpy) of O2 ?

A -94 kcal

B > -94 kcal

C < – 94 kcal

D Zero

Review Detailed Answer

Correct Answer: Zero

Refrigeration cycle_________________?

A Violates second law of thermodynamics

B Involves transfer of heat from low temperature to high temperature

C Both A. and B

D Neither A. nor B

Review Detailed Answer

Correct Answer: Involves transfer of heat from low temperature to high temperature

Measurement of thermodynamic property of temperature is facilitated by ____________ law of thermodynamics?

A 1st

B Zeroth

C 3rd

D None of these

Review Detailed Answer

Correct Answer: Zeroth

The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?

A Isobaric

B Isothermal

C Adiabatic

D None of these

Review Detailed Answer

Correct Answer: Isothermal

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?

A Δ S1 is always Δ SR

C Δ S1 is always > Δ SR

D Δ S1 is always = Δ SR

Review Detailed Answer

Correct Answer: Δ S1 is always > Δ SR

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

The third law of thermodynamics states that the__________________?

Which of the following identities can be most easily used to verify steam table data for superheated steam ?

In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________?

“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?

On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?

In the reaction, C + O2 → CO2; ΔH = – 94 kcal. What is the heat content (enthalpy) of O2 ?

Refrigeration cycle_________________?

Measurement of thermodynamic property of temperature is facilitated by ____________ law of thermodynamics?

The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?