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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.

A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by_________________?

A P1ACBP2P1

B ACBB1A1A

C ACBDA

D ADBB1A1A

Review Detailed Answer

Correct Answer: ACBDA

Pick out the correct statement?

A Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero

B Melting of ice involves increase in enthalpy and a decrease in randomness

C The internal energy of an ideal gas depends only on its pressure

D Maximum work is done under reversible conditions

Review Detailed Answer

Correct Answer: Maximum work is done under reversible conditions

Gibbs free energy (G) is represented by, G = H – TS, whereas Helmholtz free energy, A. is given by, A = E – TS. Which of the following is the Gibbs-Helmholtz equation ?

A [∂(G/T)/∂T] = – (H/T2)

B [∂(A/T)/∂T]V = – E/T2

C Both A. and B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Both A. and B.

A refrigerator works on the principle of _____________ law of thermodynamics?

A Zeroth

B First

C Second

D Third

Review Detailed Answer

Correct Answer: Second

Entropy, which is a measure of the disorder of a system, is__________________?

A Independent of pressure

B Independent of temperature

C Zero at absolute zero temperature for a perfect crystalline substance

D All A, B. & C

Review Detailed Answer

Correct Answer: Zero at absolute zero temperature for a perfect crystalline substance

One ton of refrigeration capacity is equivalent to the heat removal rate of____________________?

A 50 kcal/hr

B 200 BTU/hr

C 200 BTU/minute

D 200 BTU/day

Review Detailed Answer

Correct Answer: 200 BTU/minute

Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?

A Expansion valve

B Condenser

C Refrigerator

D Compressor

Review Detailed Answer

Correct Answer: Compressor

Lenz’s law results from the law of conservation of___________________?

A Mass

B Momentum

C Energy

D None of these

Review Detailed Answer

Correct Answer: Energy

At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is____________________?

A Zero

B One

C Infinity

D Negative

Review Detailed Answer

Correct Answer: One

____________ does not change during phase transformation processes like sublimation, melting & vaporisation?

A Entropy

B Gibbs free energy

C Internal energy

D All (A), B. & (C)

Review Detailed Answer

Correct Answer: Gibbs free energy

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by_________________?

Pick out the correct statement?

Gibbs free energy (G) is represented by, G = H – TS, whereas Helmholtz free energy, A. is given by, A = E – TS. Which of the following is the Gibbs-Helmholtz equation ?

A refrigerator works on the principle of _____________ law of thermodynamics?

Entropy, which is a measure of the disorder of a system, is__________________?

One ton of refrigeration capacity is equivalent to the heat removal rate of____________________?

Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?

Lenz’s law results from the law of conservation of___________________?

At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is____________________?

____________ does not change during phase transformation processes like sublimation, melting & vaporisation?