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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 rate of a gas phase reaction is given by K . CA . CB. If the volume of the reaction vessel is reduced to l/4th of its initial volume, then the reaction rate compared to the original rate will be _______________ times?
A 4
B 16
C 8
D 2
Correct Answer: 16
In a CSTR _______________ varies with time ?
A Reaction rate
B Concentration
C Both A. & B.
D Neither A. nor B.
Correct Answer: Neither A. nor B.
The enzyme which can catalyse the conversion of glucose to ethyl alcohol is ___________________?
A Invertase
B Maltase
C Diastase
D Zymase
Correct Answer: Zymase
The rate constant of a reaction depends on the __________________?
A Initial concentration of reactants
B Time of reaction
C Temperature of the system
D Extent of reaction
Correct Answer: Temperature of the system
The reaction A → B is conducted in an isothermal batch reactor. If the conversion of A increases linearly with holding time, then the order of the reaction is __________________?
A 0
B 1
C 1.5
D 2
Correct Answer: 0
The space time is equivalent to the holding time in a steady state mixed reactor for_____________________?
A Non-isothermal gas reaction
B Variable fluid density systems
C Constant fluid density systems
D Gas reactions with changing number of moles
Correct Answer: Constant fluid density systems
For a zero order reaction, the concentration of product increases with the _____________________?
A Increase of reaction time
B Increase in initial concentration
C Total pressure
D Decrease in total pressure
Correct Answer: Increase of reaction time
A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1; (ΔH) = – 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is_________________?
A 2/3 kW
B 1 kW
C 5/3 kW
D 4 kW
Correct Answer: 5/3 kW
If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship ?
A t ∝ 1/an
B t ∝ 1/an – 1
C t ∝ 1/an + 1
D t ∝ an
Correct Answer: t ∝ 1/an
A reactor is generally termed as an autoclave, when it is a_____________________?
A High pressure batch reactor
B Atmospheric pressure tank reactor
C High pressure tubular reactor
D Atmospheric pressure CSTR
Correct Answer: High pressure batch reactor
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