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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 expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

A With pressure changes at constant temperature

B Under reversible isothermal volume change

C During heating of an ideal gas

D During cooling of an ideal gas

Review Detailed Answer

Correct Answer: With pressure changes at constant temperature

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is_______________?

A Superheated vapour

B Partially condensed vapour with quality of 0.9

C Saturated vapour

D Partially condensed vapour with quality of 0.1

Review Detailed Answer

Correct Answer: Superheated vapour

If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be _____________ Kcal?

A -19.4

B -30.2

C 55.2

D -55.2

Review Detailed Answer

Correct Answer: -19.4

Which of the following liquid metals has the highest thermal conductivity ?

A Molten sodium

B Molten lead

C Mercury

D Molten potassium

Review Detailed Answer

Correct Answer: Molten sodium

High _____________ is an undesirable property for a good refrigerant?

A Specific heat

B Latent heat of vaporisation

C Viscosity

D Specific vapor volume

Review Detailed Answer

Correct Answer: Viscosity

Specific _____________ does not change during phase change at constant temperature and pressure?

A Entropy

B Gibbs energy

C Internal energy

D Enthalpy

Review Detailed Answer

Correct Answer: Gibbs energy

A change in state involving a decrease in entropy can be spontaneous, only if ____________________?

A It is exothermic

B It is isenthalpic

C It takes place isothermally

D It takes place at constant volume

Review Detailed Answer

Correct Answer: It is exothermic

For a constant volume process _____________ by the system is used only to increase the internal energy?

A Heat absorbed

B Work done

C Both A. & B

D Neither A. nor B

Review Detailed Answer

Correct Answer: Heat absorbed

Internal energy of an element at 1 atm and 25° C is ____________ kcal/kg.mole?

A 0

B 273

C 25

D None of these

Review Detailed Answer

Correct Answer: 0

“Law of corresponding states” says that___________________?

A Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same

B The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at

C No gas can be liquefied above the critical temperature, howsoever high the pressure may be.

D The molar heat of energy of gas at constant volume should be nearly constant (about 3

Review Detailed Answer

Correct Answer: Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is_______________?

If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be _____________ Kcal?

Which of the following liquid metals has the highest thermal conductivity ?

High _____________ is an undesirable property for a good refrigerant?

Specific _____________ does not change during phase change at constant temperature and pressure?

A change in state involving a decrease in entropy can be spontaneous, only if ____________________?

For a constant volume process _____________ by the system is used only to increase the internal energy?

Internal energy of an element at 1 atm and 25° C is ____________ kcal/kg.mole?

“Law of corresponding states” says that___________________?