Remain the same
Be halved
Also be doubled
Become one fourth
✅ The correct answer is option A.
Chemical Reaction Engineering MCQs
A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?
Large reactor followed by smaller one
Smaller reactor followed by larger one
Either of the arrangement A or B will give the same yield
Data insufficient, can
✅ The correct answer is option C.
A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be
2τ
0.5τ
τ/0.693
0.693τ
✅ The correct answer is option A.
__________ catalytic reaction is involved in the thermal cracking of gas oil.
Homogeneous
Homogeneous non
Heterogeneous
Heterogeneous non
✅ The correct answer is option A.
When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.
Twice
Half
Equal
None of these
✅ The correct answer is option B.
The performance equations for constant density systems are identical for
P.F.R. and backmix reactor
P.F.R. and batch reactor
P.F.R, batch reactor and backmix reactor
Batch reactor and backmix reactor
✅ The correct answer is option B.
In case of a/an __________ chemical reaction, conversion increases with the rise in temperature.
Reversible exothermic
Irreversible exothermic
Irreversible endothermic
Reversible endothermic
✅ The correct answer is option D.
With increase in temperature, the equilibrium conversion of a reversible exothermic reaction
Decreases
Increases
Remains unaffected
Decreases linearily with temperature
✅ The correct answer is option A.
Which of the following is not a chemical step in a fluid solid catalytic reaction?
Surface chemical reaction
Adsorption
Desorption
None of these
✅ The correct answer is option D.
If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst
Porosity is very important
Porosity is of less importance
Internal surface area is utilised efficiently
None of these
✅ The correct answer is option B.