Reaction rate
Concentration
Both A & B
Neither A nor B
✅ The correct answer is option D.
Chemical Reaction Engineering MCQs
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.
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.
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.
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.
Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)
Reactor dispersion number (D/vL)
Reduced time (vt/V)
Thiele modulus (L√(k/D1)
None of these
✅ The correct answer is option D.
An autothermal reactor is
Most suitable for a second order reaction
Most suitable for a reversible reaction
Completely self-supporting in its thermal energy requirements
Isothermal in nature
✅ The correct answer is option C.
Transition state theory relates the above quantities as
K ∝ e-E/RT
K ∝ T.eE/RT
K ∝ √T
K ∝ T1.5
✅ The correct answer is option B.
The rate constant of a reaction depends on the
Initial concentration of reactants
Time of reaction
Temperature of the system
Extent of reaction
✅ The correct answer is option C.
The extent of a reaction is
Different for reactants and products
Dimensionless
Depends on the stoichiometric co-efficient
All of the above
✅ The correct answer is option D.