Is always equal to
Is always greater than
Is always less than
May be greater or less than
✅ The correct answer is option B.
Chemical Reaction Engineering MCQs
342. For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single
CSTR of volume V
PFR of volume V
CSTR of volume V/X
PFR of volume V/X
✅ The correct answer is option B.
343. For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.
Physical
Chemical
Both A and B
Neither A nor B
✅ The correct answer is option B.
344. 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
More
Less
Same
Either A or B, depends on other factors
✅ The correct answer is option C.
345. The unit of frequency factor in Arhenious equation is
Same as that of rate constant
Same as that of activation energy
Dimensionless
None of these
✅ The correct answer is option A.
346. __________ explains the mechanism of catalysis.
Activated complex theory
Collision theory
Thermodynamics
None of these
✅ The correct answer is option A.
347. In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds.
Catalytic
Parallel
Series
Auto catalytic
✅ The correct answer is option D.
348. In a semi-batch reactor,
Mixing takes place in axial direction only
Velocity of reaction can be controlled
Condition similar to plug flow reactor exists
Residence time is constant
✅ The correct answer is option B.
349. Vegetable oils are hydrogenated in a __________ reactor.
Slurry
Plug flow
Homogeneous catalytic
None of these
✅ The correct answer is option A.
350. Which of the following is not endothermic in nature?
Combustion of sulphur
Gasification of carbon
Thermal cracking of fuel oil
Steam reforming of naphtha
✅ The correct answer is option A.