Chemical Reaction Engineering Books Multiple Choice Questions - Set 26 - ObjectiveBooks

Chemical Reaction Engineering Books Multiple Choice Questions - Set 26

Practice Test: Question Set - 26

1. Radioactive decay follows __________ order kinetics.
    (A) First
    (B) Second
    (C) Third
    (D) Zero

2. A gaseous reactant is introduced in a mixed reactor of 3 liters volume at the rate of 1 liter/second. The space time is __________ seconds.
    (A) 1
    (B) 3
    (C) 1/3
    (D) 32

3. Pick out the wrong statement.
    (A) The integral method of analyzing kinetic data is used when the data is scattered
    (B) The differential method of analyzing kinetic data requires more accurate or larger amounts of data
    (C) When the reaction rate is independent of temperature, the reaction is said to be of zero order
    (D) The ratio of volumes of plug flow reactor to that of mixed reactor is always less than one for identical feed composition, flow rate, conversion and for all positive reaction orders

4. The importance of diffusion in a catalyst are increased by
    (A) Large catalyst particle size
    (B) An active surface of the catalyst
    (C) Small pore diameter
    (D) All (a), (b) and (c)

5. The single parameter model proposed for describing non-ideal flow is the __________ model.
    (A) Tank in series
    (B) Dispersion
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

6. In an ideal mixed reactor (at steady state), the
    (A) Space time is equivalent to holding time for constant density systems
    (B) Composition throughout the reactor remains same
    (C) Exit stream has the same composition as the fluid within the reactor
    (D) All (a), (b) and (c)

7. Photochemical reaction rate does not depend significantly on temperature, because
    (A) It is a reversible reaction
    (B) It is an exothermic reaction
    (C) The energy of reacting molecules exceeds the activation energy by absorption of light
    (D) None of these

8. For an ideal plug flow reactor, the value of Peclet number is
    (A) 0
    (B) 1
    (C) 10

9. A batch reactor is suitable for
    (A) Achieving cent percent conversion of reactants into products
    (B) Large scale gaseous phase reactions
    (C) Liquid phase reactions
    (D) Obtaining uniform polymerization products in highly exothermic reactions

10. Carbon particles accumulated on the catalyst used in the gas oil cracking lies in the category of __________ poison.
    (A) Deposited
    (B) Chemisorbed
    (C) Selectivity
    (D) Stability

11. A backmix reactor
    (A) Is same as plug-flow reactor
    (B) Is same as ideal stirred tank reactor
    (C) Employs mixing in axial direction only
    (D) Is most suitable for gas phase reaction

12. Which of the following factors control the deactivation of a porous catalyst pellet?
    (A) Decay reactions
    (B) Pore diffusion
    (C) Form of surface attack by poison
    (D) All (a), (b) and (c)

13. For a solid catalyzed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.
    (A) Physical
    (B) Chemical
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

14. The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order.
    (A) Zero
    (B) First
    (C) Second
    (D) None of these

15. In the reversible reaction of the type, A + B  AB, in general
    (A) Both forward and backward reactions will be exothermic
    (B) Neither of the reactions will be endothermic
    (C) The combination reaction will be exothermic, while the dissociation reaction will be endothermic
    (D) The combination reaction will be endothermic, while the dissociation reaction will be exothermic

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