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Chemical Engineering :: Chemical Reaction Engineering

  1. In a chemical reaction, __________ are conserved.

  2. A.

     Ions

    B.

     Masses

    C.

     Atoms

    D.

     Both B & C


  3. With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)

  4. A.

     Increases

    B.

     Decreases

    C.

     Remains same

    D.

     Increases linearly


  5. If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

  6. A.

     Zero

    B.

     One

    C.

     Two

    D.

     Three


  7. Ionic reactions occur in

  8. A.

     Solid state only

    B.

     Liquid state only

    C.

     Solutions

    D.

     Any state


  9. Autocatalytic reactions are best carried out in a

  10. A.

     CSTR

    B.

     CSTR in series

    C.

     Plug flow reactor

    D.

     Recycle reactor


  11. Half life period of a first order irreversible reaction A → B is

  12. A.

     K/2

    B.

     Ln k/2

    C.

     Ln 2/k

    D.

     Ln 0.5/k


  13. Which of the following is an autocatalytic reaction?

  14. A.

     Photochemical reactions

    B.

     Microbial fermentation reaction

    C.

     Enzyme fermentation reaction

    D.

     Ammonia synthesis reaction


  15. Which of the following is not endothermic in nature?

  16. A.

     Combustion of sulphur

    B.

     Gasification of carbon

    C.

     Thermal cracking of fuel oil

    D.

     Steam reforming of naphtha


  17. For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.

  18. A.

     Film diffusion

    B.

     Diffusion through ash layer

    C.

     Chemical reaction

    D.

     Either A, B or C


  19. For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance.

  20. A.

     Film diffusion

    B.

     Diffusion through ash layer

    C.

     Chemical reaction

    D.

     Either A, B or C