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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 melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise?

A Increases

B Decreases

C Remains unchanged

D Decreases linearly

Review Detailed Answer

Correct Answer: Increases

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

In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when___________________?

A Cp < Cv

B Cp = Cv

C Cp > Cv

D C ≥ Cv

Review Detailed Answer

Correct Answer: Cp = Cv

“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

The internal energy of an ideal gas does not change in a reversible _____________ process?

A Isothermal

B Adiabatic

C Isobaric

D Isometric

Review Detailed Answer

Correct Answer: Isothermal

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

Which of the following decreases with increase in pressure ?

A Melting point of ice

B Melting point of wax

C Boiling point of liquids

D None of these

Review Detailed Answer

Correct Answer: Melting point of ice

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

Near their critical temperatures, all gases occupy volumes _____________ that of the ideal gas?

A Less than

B Same as

C More than

D Half

Review Detailed Answer

Correct Answer: Less than

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

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise?

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

In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when___________________?

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

The internal energy of an ideal gas does not change in a reversible _____________ process?

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) ?

Which of the following decreases with increase in pressure ?

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

Near their critical temperatures, all gases occupy volumes _____________ that of the ideal gas?

Refrigeration cycle_________________?