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Chemical Engineering :: Chemical Reaction Engineering

  1. Which of the following is not a unit of reaction rate?

  2. A.

     Moles for med/(surface of catalyst) (time)

    B.

     Moles formed/volume of reactor) (time)

    C.

     Mole formed/volume of catalyst) (time)

    D.

     None of these


  3. Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.

  4. A.

     Proportional to

    B.

     Independent of

    C.

     Inversely proportional to

    D.

     Proportional to the square of


  5. Conversion increases with increase in temperature in case of a an __________ reaction.

  6. A.

     Autocatalytic

    B.

     Irreversible

    C.

     Reversible endothermic

    D.

     Reversible exothermic


  7. Half life period of decomposition of a liquid 'A' by irreversible first order reaction is 12 minutes. The time required for 75% conversion of 'A' is __________ minutes.

  8. A.

     18

    B.

     24

    C.

     6

    D.

     12


  9. What is the value of 'n' if the reaction rate of the chemical reaction A → B, is proportional to CAn and it is found that the reaction rate triples, when the concentration of 'A' is increased 9 times ?

  10. A.

     1/2

    B.

     1/3

    C.

     1/9

    D.

     3


  11. There is no correspondence between stoichiometry and the rate equation in case of a/an __________ reaction.

  12. A.

     Elementary

    B.

     Multiple

    C.

     Autocatalytic

    D.

     Non-elementary


  13. For a zero order reaction, the concentration of product increases with the

  14. A.

     Increase of reaction time

    B.

     Increase in initial concentration

    C.

     Total pressure

    D.

     Decrease in total pressure


  15. The conversion for a first order liquid phase reaction. A → B in a CSTR is 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be

  16. A.

     60

    B.

     75

    C.

     90

    D.

     100


  17. The rate constant of a first order reaction depends on the

  18. A.

     Concentration of the reactant

    B.

     Temperature

    C.

     Concentration of the product

    D.

     Time


  19. For all positive reaction orders for a particular duty,

  20. A.

     Mixed reactor is always larger than the plug-flow reactor

    B.

     Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order

    C.

     Reactor size is independent of the type of flow

    D.

     Density variation during reaction affects design