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Chemical Engineering :: Chemical Reaction Engineering

  1. In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.

  2. A.

     Semi-batch

    B.

     Tubular

    C.

     Batch

    D.

     Back-mix

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  3. For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a

  4. A.

     Batch reactor is preferred over a single CSTR for high yield

    B.

     Tubular reactor is preferred over a single CSTR for high yield

    C.

     Both A and B

    D.

     Single CSTR is the most suitable

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  5. Maximum equilibrium conversion for endothermic reaction is obtained at the __________ temperature.

  6. A.

     Highest possible

    B.

     Lowest possible

    C.

     Intermediate

    D.

     Room

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  7. The gas phase reaction 2A ⇋ B is carried out in an isothermal plug flow reactor. The feed consists of 80 mole % A and 20 mole % inerts. If the conversion of A at the reactor exit is 50%, then CA/CA0 at the outlet of the reactor is

  8. A.

     2/3

    B.

     5/8

    C.

     1/3

    D.

     3/8

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  9. The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are

  10. A.

     2 & 1

    B.

     11 & 2

    C.

     2 && 2

    D.

     1 & 1

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  11. From collison theory, the reaction rate constant is proportional to

  12. A.

     Exp(- E/RT)

    B.

     Exp(- E/2RT)

    C.

     √T

    D.

     Tm.exp(- E/RT)

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  13. For any reaction, we may write conversion as a function of

  14. A.

     Time

    B.

     Temperature

    C.

     Concentration

    D.

     All of the above

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  15. In flow reactors, the performance equations interrelate the rate of reaction to the

  16. A.

     Feed rate

    B.

     Reactor volume

    C.

     Extent of reaction

    D.

     All of the above

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  17. The space time is equivalent to the holding time in a steady state mixed reactor for

  18. A.

     Non-isothermal gas reaction

    B.

     Variable fluid density systems

    C.

     Constant fluid density systems

    D.

     Gas reactions with changing no. of moles

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  19. For a heterogeneous catalytic reaction

  20. A.

     Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction

    B.

     A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important

    C.

     The catalyst does not form an intermediate complex with the reactant

    D.

     The surface of the catalyst does not play an important role during reaction

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