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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


  3. Promoter is added to the catalyst to improve its

  4. A.

     Porosity

    B.

     Sensitivity

    C.

     Surface area

    D.

     None of these


  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


  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


  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


  11. An example of autothermal reactor operation is

  12. A.

     Sulphur dioxide oxidation

    B.

     Ethylene oxidation

    C.

     Benzene oxidation

    D.

     Ammonia synthesis


  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


  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


  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


  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