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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

Variables affecting the rate of homogeneous reactions are___________________?
A Pressure and temperature only
B Temperature and composition only
C Pressure and composition only
D Pressure, temperature and composition
Correct Answer: Pressure, temperature and composition
In a zero order reaction, reactants concentration does not change with time and the_________________?
A Time for half change is half the time taken for completion of the reaction
B Time for half change is independent of the initial concentration
C Time for completion of the reaction is independent of the initial concentration
D Reaction rate is trebled when the initial concentration is trebled
Correct Answer: Time for half change is half the time taken for completion of the reaction
In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is___________________?
A More
B Less
C Same
D Either A. or B., depends on other factors
Correct Answer: Same
Volume change for unimolecular type first order reaction as shown in the bellow figure, increases _____________ with time?
A Linearly
B Exponentially
C Parabolically
D Logarithmically
Correct Answer: Exponentially
Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ?
A Langmuir’s assumption applies to every adsorbed layer
B There is no dynamic equilibrium between successive layer
C The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer
D None of these
Correct Answer: There is no dynamic equilibrium between successive layer
An example of autothermal reactor operation is______________________?
A Sulphur dioxide oxidation
B Ethylene oxidation
C Benzene oxidation
D Ammonia synthesis
Correct Answer: Ethylene oxidation
A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are_____________________?
A Equal in size
B Of different sizes
C Of such size that the ratio of their volumes is < 5
D None of these
Correct Answer: Equal in size
________________ resistance is not involved in the combustion of a carbon particle?
A Gas film
B Ash
C Chemical reaction
D None of these
Correct Answer: Ash
The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be _______________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?
A 0
B 1
C 2
D 3
Correct Answer: 3
A photochemical reaction is _______________ light?
A Initiated by
B Accompanied with emission of
C Catalysed by
D Used to convert heat energy into
Correct Answer: Initiated by
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