Chemical Reaction Engineering problems
- 1. Which of the following will give maximum gas conversion?
Options- A. Fixed bed reactor.
- B. Fluidised bed reactor.
- C. Semi-fluidised bed reactor.
- D. Plug-flow catalytic reactor. Discuss
Correct Answer: Semi-fluidised bed reactor.
- 2. A first order reaction requires two equal sized CSTR. The conversion is
Options- A. less when they are connected in series.
- B. more when they are connected in series.
- C. more when they are connected in parallel.
- D. same whether they are connected in series or in parallel. Discuss
Correct Answer: more when they are connected in series.
- 3. The reaction between oxygen and organic material is a/an __________ reaction.
Options- A. exothermic
- B. endothermic
- C. biochemical
- D. photochemical Discuss
Correct Answer: exothermic
- 4. 6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO2 and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant?
Options- A. 100%
- B. 95%
- C. 75%
- D. 20% Discuss
Correct Answer: 95%
- 5. Pick out the correct statement
Options- A. Reactions with high activation energies are very temperature sensitive.
- B. Chemical equilibrium is a static state.
- C. A photochemical reaction is catalysed by light.
- D. A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction. Discuss
Correct Answer: Reactions with high activation energies are very temperature sensitive.
- 6. Reaction rate equation for the reaction,
. If S at is present in large excess, what is the order of this reaction?
Options- A. zero
- B. one
- C. two
- D. three Discuss
Correct Answer: one
- 7. For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.
Options- A. physical
- B. chemical
- C. both (a) and (b)
- D. neither (a) nor (b) Discuss
Correct Answer: chemical
- 8. __________ is the response curve for a step input signal from a reactor.
Options- A. S-curve
- B. C-curve
- C. I-curve
- D. none of these Discuss
Correct Answer: C-curve
- 9. The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy.
Options- A. activation
- B. potential
- C. binding
- D. threshold Discuss
Correct Answer: activation
- 10. A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length
Options- A. decreases.
- B. increases.
- C. is at the highest allowable temperature throughout.
- D. first increases and then decreases. Discuss
Correct Answer: is at the highest allowable temperature throughout.
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