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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

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  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

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  5. The dispersion number of perfect mixed flow is

  6. A.

     0

    B.

     > 150

    C.

     ∞

    D.

     < 2100

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  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

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  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

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  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

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  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

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  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

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  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

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  19. The reactions with low activation energy are

  20. A.

     Always spantaneous

    B.

     Slow

    C.

     Fast

    D.

     Non-spontaneous

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