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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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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.

All Topics  9594

Gibbs free energy (F) is defined as__________________?
A F = E – TS
B F = H – TS
C F = H + TS
D F = E + TS
Correct Answer: F = H – TS
The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition?
A Internal energy
B Enthalpy
C Gibbs free energy
D Helmholtz free energy
Correct Answer: Gibbs free energy
Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?
A Pressure must be kept below 5.2 atm
B Temperature must be kept above – 57°C
C Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively
Correct Answer: Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively
The compressibility factor for an ideal gas is 1. Its value for any other real gas is_______________?
A 1
B 1
C
D Either B. or C, depends on the nature of the gas
Correct Answer: Either B. or C, depends on the nature of the gas
The adiabatic throttling process of a perfect gas is one of constant enthalpy_________________?
A In which there is a temperature drop
B Which is exemplified by a non-steady flow expansion
C Which can be performed in a pipe with a constriction
D In which there is an increase in temperature
Correct Answer: Which can be performed in a pipe with a constriction
“When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the_______________?
A Le-Chatelier principle
B Kopp’s rule
C Law of corresponding state
D Arrhenius hypothesis
Correct Answer: Le-Chatelier principle
____________ explains the equilibrium constant for any chemical reaction?
A Henry’s law
B Law of mass action
C Hess’s law
D None of these
Correct Answer: Law of mass action
Entropy change for an irreversible process taking system and surrounding together is___________________?
A 0
B > 0
C < 0
D None of these
Correct Answer: 0
Third law of thermodynamics is helpful in___________________?
A Prediction of the extent of a chemical reaction
B Calculating absolute entropies of substances at different temperature
C Evaluating entropy changes of chemical reaction
D Both B. and C.
Correct Answer: Both B. and C.
The internal energy of an ideal gas is a function of its _____________ only?
A Molecular size
B Volume
C Pressure
D Temperature
Correct Answer: Temperature
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