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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

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  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

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

  6. A.

     Autocatalytic

    B.

     Irreversible

    C.

     Reversible endothermic

    D.

     Reversible exothermic

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  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

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  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

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  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

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  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

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  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

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  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

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  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

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