m
1/m
√m
m²
✅ The correct answer is option B.
Chemical Reaction Engineering MCQs
Which of the following is the most suitable for isothermal operation?
Batch reactor
Back-mix reactor
Plug-flow reactor
Fixed bed reactor
✅ The correct answer is option B.
With increase in temperature, the rate constant obeying Arhenious equation
Increases
Decreases
Decreases exponentially
Can either increase or decrease ; depends on the frequency factor
✅ The correct answer is option C.
The reaction between oxygen and organic material is a/an __________ reaction.
Exothermic
Endothermic
Biochemical
Photochemical
✅ The correct answer is option A.
When the reaction is dominated by in-traparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as
ND = (n + 1)/2
ND = n/2
ND = n + 1
None of these
✅ The correct answer is option A.
Arhenious equation shows the variation of __________ with temperature.
Reaction rate
Rate constant
Energy of activation
Frequency factor
✅ The correct answer is option B.
A back mix reactor is
Suitable for gas phase reactions
Ideal at very low conversion
Same as plug flow reactor (PFR)
Same as ideal stirred tank reactor
✅ The correct answer is option D.
If in the gaseous phase reaction, N₂O₄ ⇋ 2NO₂, x is the part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be
(1 + x)
(1 – x)
(1 + x)²
(1 – x)²
✅ The correct answer is option A.
The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is
0
1
2
3
✅ The correct answer is option C.
The decomposition of A into B is represented by the exothermic reaction, A ⇋ 2B. To achieve maximum decomposition, it is desirable to carry out the reaction.
At high P and high T
At low P and high T
At low P and low T
At high P and low T
✅ The correct answer is option C.