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Chemical Engineering :: Chemical Reaction Engineering

  1. When a high liquid hold up is required in a reactor for gas liquid reaction, use __________ coloumn.

  2. A.

     Packed

    B.

     Spray

    C.

     Tray

    D.

     Bubble

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  3. Promoter is added to the catalyst to improve its

  4. A.

     Porosity

    B.

     Sensitivity

    C.

     Surface area

    D.

     None of these

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  5. The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called

  6. A.

     Operational yield

    B.

     Relative yield

    C.

     Selectivity

    D.

     None of these

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  7. For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

  8. A.

     1

    B.

     0.5

    C.

     0.1

    D.

     0

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  9. In which of the following reactions, thee-quilibrium will shift to the right, if the total pressure is increased?

  10. A.

     H₂ + Cl₂ ⇋ 2HCl

    B.

     N₂ + O₂ ⇋ 2NO

    C.

     N₂O₄ ⇋ 2 NO₂

    D.

     H₂ + I₂ ⇋ 2HI

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  11. An example of autothermal reactor operation is

  12. A.

     Sulphur dioxide oxidation

    B.

     Ethylene oxidation

    C.

     Benzene oxidation

    D.

     Ammonia synthesis

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  13. The performance of a cascade of CSTR's can be improved by adding

  14. A.

     A P.F. reactor in series

    B.

     A P.F. reactor in parallel

    C.

     More CSTR's in series

    D.

     More CSTR's in parallel

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  15. For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is

  16. A.

     1

    B.

     >1

    C.

     ∞

    D.

     ≥1

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  17. Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

  18. A.

     Zero order

    B.

     Third order

    C.

     Consecutive

    D.

     None of these

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  19. Kinetics of a solid catalysed reaction can best be studied in a __________ reactor.

  20. A.

     Batch

    B.

     Plug-flow

    C.

     Mixed

    D.

     None of these

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