Space time for each parallel line is same
Space time for parallel lines is different
Larger reactors have more space time compared to smaller ones
None of these
✅ The correct answer is option A.
Chemical Reaction Engineering MCQs
352. The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is
∞
0
1
> 1
✅ The correct answer is option C.
353. If helium is introduced in a reactor containing O₂, SO₂ and SO₃ at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO₃ (as per Le Chatlier principle)
Decreases
Increases
Remains unaltered
Changes unpredictably
✅ The correct answer is option A.
354. For a __________ order reaction, the units of rate constant and rate of reaction are the same.
Zero
First
Second
Fractional
✅ The correct answer is option A.
355. A catalyst is said to be a negative catalyst, ifit
Retards the rate of reaction
Reduces the value of equilibrium constant
Does not initiate the reaction
All of the above
✅ The correct answer is option A.
356. Exposure of a photographic plate to produce a latent image is an example of __________ reaction.
Very slow
Very fast
Photochemical
Both B and C
✅ The correct answer is option D.
357. Rate constant ‘k’ and absolute temperature ‘T’ are related by collision theory (for bimolecular) as
k ∝ T1.5
k ∝ exp(-E/RT)
k ∝ √T
k ∝ T
✅ The correct answer is option C.
358. Promoter.
Initiates a chemical reaction and is a catalyst by itself
Atlers the position of equilibrium in a reversible reaction
Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals
All of the above
✅ The correct answer is option C.
359. Fluidised bed reactor is characterised by
Uniformity of temperature
Comparatively smaller equipment
Very small pressure drop
Absence of continuous catalyst regeneration facility
✅ The correct answer is option A.
360. Which of the following will favour the reverse reaction in a chemical equilibrium reaction?
Increasing the concentration of one of the reactants
Increasing the concentration of one or more of the products
Removal of at least one of the products at regular interval
None of these
✅ The correct answer is option B.