361. Which of the following is used for calcination of limestone and dolomite in industrial practice?
Fluidised bed reactor
Moving bed reactor
Fixed bed reactor
None of these
✅ The correct answer is option B.
Chemical Reaction Engineering MCQs
362. The residence time distribution of an ideal CSTR is
1/τ exp (-t/τ)
Τ exp (-t/τ)
Exp(-t/τ)
1/τ (-t/τ)
✅ The correct answer is option C.
363. In a CSTR __________ varies with time.
Reaction rate
Concentration
Both A & B
Neither A nor B
✅ The correct answer is option D.
364. Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.
Increases
Remains unchanged
Decreases
Unpredictable from the data
✅ The correct answer is option C.
365. In the fluid catalytic cracker (FCC), the cracking reaction is __________ (i) and the regeneration is ____________ (ii)
(i) exothermic (ii) endothermic
(i) exothermic (ii) exothermic
(i) endothermic (ii) enodthermic
(i) endothermic (ii) exothermic
✅ The correct answer is option D.
366. Which of the following fixes the volume of a batch reactor for a particular conversion and production rate?
Operating conditions (e.g. pressure and temperature)
Rate constant
Density of mixture
None of these
✅ The correct answer is option C.
367. The importance of diffusion in a catalyst are increased by
Large catalyst particle size
An active surface of the catalyst
Small pore diameter
All of the above
✅ The correct answer is option D.
368. Which of the following is not a theory of homogeneous reaction?
Collision theory and activated complex theory
Chain reaction theory
Radiation hypothesis
None of these
✅ The correct answer is option D.
369. For the reversible reaction A ⇋ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium?
0.253
0.338
0.152
0.637
✅ The correct answer is option B.
370. A catalyst inhibitor
Lessens its selectivity
May be useful for suppressing undesirable side reactions
Is added in small quantity during the catalyst manufacture itself
All of the above
✅ The correct answer is option D.