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Chemical Engineering :: Chemical Reaction Engineering

  1. The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K Cxn, the value of 'n' in this case will be

  2. A.

     0

    B.

     1

    C.

     2

    D.

     3


  3. Which of the following is not a chemical step in a fluid solid catalytic reaction?

  4. A.

     Surface chemical reaction

    B.

     Adsorption

    C.

     Desorption

    D.

     None of these


  5. The dispersion number of perfect mixed flow is

  6. A.

     0

    B.

     > 150

    C.

     ∞

    D.

     < 2100


  7. Sometimes, batch process is preferred over continuous process, when the product

  8. A.

     Quality & yield can not be achieved in continuous processes, because of long residence time

    B.

     Sales demand is fluctuating

    C.

     Both A & B

    D.

     Neither A nor B


  9. For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.

  10. A.

     Fixed

    B.

     Fluidised bed reactor followed by a fixed

    C.

     Fixed bed reactor followed by a fluidised

    D.

     Fluidised


  11. The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CAn, then what is the value of n for this reaction?

  12. A.

     0.5

    B.

     1

    C.

     0

    D.

     2


  13. Which of the following fixes the volume of a batch reactor for a particular conversion and production rate?

  14. A.

     Operating conditions (e.g. pressure and temperature)

    B.

     Rate constant

    C.

     Density of mixture

    D.

     None of these


  15. The 'E' curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt

  16. A.

     At the inlet

    B.

     At the outlet

    C.

     In the reactor

    D.

     Averaged over the inlet and outlet


  17. The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line?

  18. A.

     XA Vs . τ

    B.

     XA Vs ln τ

    C.

     XA/(1 - XA)Vs τ

    D.

     XA(1 - XA)Vs τ


  19. The reactions with low activation energy are

  20. A.

     Always spantaneous

    B.

     Slow

    C.

     Fast

    D.

     Non-spontaneous