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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

The principle applied in liquefaction of gases is_____________________?
A Adiabatic expansion
B Joule-Thomson effect
C Both A. and B
D Neither A. nor B
Correct Answer: Both A. and B
The second law of thermodynamics states that___________________?
A The energy change of a system undergoing any reversible process is zero
B It is not possible to transfer heat from a lower temperature to a higher temperature
C The total energy of system and surrounding remains the same
D None of the above
Correct Answer: None of the above
Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?
A Decreases
B Increases
C Remains constant
D Decreases logarithmically
Correct Answer: Increases
In the equation, PVn = constant, if the value of n = 1, then it represents a reversible _____________ process?
A Isothermal
B Isobaric
C Polytropic
D Adiabatic
Correct Answer: Isothermal
Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of___________________?
A Solution
B Vaporisation
C Formation
D Sublimation
Correct Answer: Vaporisation
The absolute entropy for all crystalline substances at absolute zero temperature is ____________________?
A Zero
B Negative
C More than zero
D Indeterminate
Correct Answer: Zero
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is__________________?
A Less pronounced
B More pronounced
C Equal
D Data insufficient, can’t be predicted
Correct Answer: More pronounced
For spontaneous changes in an isolated system (S = entropy) ___________________?
A ds = 0
B ds <0
C ds > 0
D ds = Constant
Correct Answer: ds > 0
What happens in a reversible adiabatic expansion process ?
A Heating takes place
B Cooling takes place
C Pressure is constant
D Temperature is constant
Correct Answer: Cooling takes place
For an exothermic reaction ____________________?
A Only enthalpy change (ΔH) is negative
B Only internal energy change (ΔE) is negative
C Both ΔH and ΔE are negative
D Enthalpy change is zero
Correct Answer: Both ΔH and ΔE are negative
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