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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

For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ________________ is the controlling resistance?
A Film diffusion
B Diffusion through ash layer
C Chemical reaction
D Either A., B. or C.
Correct Answer: Chemical reaction
For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases ______________ times?
A 8
B 12
C 16
D 32
Correct Answer: 16
Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction ?
A Ash resistance
B Gas film and pore surface diffusion resistances for reactants
C Surface phenomenon resistance
D Gas film and pore surface diffusion resistances for products
Correct Answer: Ash resistance
The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reactions with low activation energy are ________________?
A Always irreversible
B Insensitive to temperature changes
C Mostly irreversible
D Highly temperature sensitive
Correct Answer: Insensitive to temperature changes
A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be ____________________ minutes?
A 4
B 8
C 12
D 16
Correct Answer: 16
Fluidised bed reactor is characterized by____________________?
A Uniformity of temperature
B Comparatively smaller equipment
C Very small pressure drop
D Absence of continuous catalyst regeneration facility
Correct Answer: Uniformity of temperature
Velocity of a chemical reaction___________________?
A Decreases with increase in temperature
B Increases with increase of pressure of reactants for all reactions
C Decreases with increase of reactant concentration
D None of these
Correct Answer: None of these
Shift conversion reaction_________________?
A Converts N2 and H2 into NH3
B Converts CO to CO2 with steam
C Is non-catalytic
D Is highly exothermic
Correct Answer: Converts CO to CO2 with steam
The conversion for a second order, irreversible reaction (constant volume) as shown in the bellow figure, in batch mode is given by______________?
A 1/(1 + k2 . CA0 . t)
B (k2 . CA0 . t)/ (1 + k2 . CA0 . t)
C (k2 . CA0 . t)2/ (1 + k2 . CA0 . t)
D (k2 . CA0 . t)/ (1 + k2 . CA0 . t)2
Correct Answer: (k2 . CA0 . t)/ (1 + k2 . CA0 . t)
Find a mechanism that is consistent with the rate equation and reaction given below ?
A A + B ⇌ AB; AB + A → A2B
B A + B → AB; AB + A → A2B
C A + A → AA; AA + B → A2B
D A + A ⇌ AA; AA + B → A2B
Correct Answer: A + A ⇌ AA; AA + B → A2B
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