Chemical Engineering Reaction Equilibrium Questions Answers - Set 30 - ObjectiveBooks

Chemical Engineering Reaction Equilibrium Questions Answers - Set 30

Practice Test: Question Set - 30


1. For a series of reactions of the bellow figure, having k1 << k2, the reaction system can be approximated as


2. A balanced chemical reaction equation conforms to the law of
    (A) Conservation of mass
    (B) Avogadro’s hypothesis
    (C) Gaseous volumes
    (D) None of these

3. Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature?
    (A) Time
    (B) Useful volume of the tank
    (C) Diameter of the reactor
    (D) None of these

4. Molecularity of a reaction
    (A) Is always equal to the overall order of reaction
    (B) May not be equal to the order of reaction
    (C) Can’t have a fractional value
    (D) Both (b) and (c)

5. Pick out the correct statement.
    (A) A lower temperature favors the reaction of lower activation energy
    (B) The dispersion number for a reactor/vessel is uL/D
    (C) The rate controlling step in a reaction involving many steps is the fastest step
    (D) Pore volume and porosity of a catalyst is measured by Brunaver-Emmet-Teller (BET) technique

6. An elementary liquid phase decomposition reaction as shown in the bellow figure is to be carried out in a CSTR. The design equation is:
    (A) kτ = XA/(1 - XA)
    (B) kτ = XA(1 + XA)/(1 + XA)
    (C) kτ = XA/(1 - XA)2
    (D) None of these

7. When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.
    (A) Is greater than
    (B) Is smaller than
    (C) Equals
    (D) Can be either greater or smaller than (depends on the type of reaction)

8. A multiple reaction may be classified as a __________ reaction.
    (A) Consecutive or side
    (B) Parallel or side
    (C) Mixed
    (D) All (a), (b) and (c)

9. In flow reactors, the performance equations interrelate the rate of reaction to the
    (A) Feed rate
    (B) Reactor volume
    (C) Extent of reaction
    (D) All (a), (b) and (c)

10. A consecutive reaction, as shown in the bellow figure, is characterized by
    (A) Maxima in the concentration of A
    (B) Maxima in the concentration of B
    (C) Maxima in the concentration of C
    (D) High exothermicity

11. In an ideal tubular-flow reactor
    (A) There is no mixing in longitudinal direction
    (B) Mixing takes place in radial direction
    (C) There is a uniform velocity across the radius
    (D) All (a), (b) and (c)

12. Slurry reactors are characterized by the
    (A) Lack of intraparticle diffusion resistance
    (B) Presence of two mobile phases
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

13. In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation.
    (A) Adiabatic
    (B) Isothermal
    (C) Non-adiabatic
    (D) None of these

14. For the irreversible elementary first order reaction in parallel as shown in the bellow figure, a plot of Cy VsCz will give a straight line having a slope of
    (A) K2/K1
    (B) K1/K2
    (C) K1 . K2
    (D) K1 + K2

15. For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.
    (A) Stirred tank
    (B) Tubular flow
    (C) Batch
    (D) Fixed bed

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