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Chemical Engineering :: Chemical Reaction Engineering

  1. An isothermal aqueous phase reversible reaction, P R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is

  2. A.
    0.80
    B.
    1.33
    C.
    1.60
    D.
    2.67

  3. Design of heterogeous catalytic reactor involves consideration of __________ steps.

  4. A.
    only chemical
    B.
    only physical
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

  5. A consecutive reaction, , is characterised by

  6. A.
    maxima in the concentration of A.
    B.
    maxima in the concentration of B.
    C.
    maxima in the concentration of C.
    D.
    high exothermicity.

  7. What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?

  8. A.
    Litre/mole.second
    B.
    Moles/litre.second
    C.
    Litre/mole
    D.
    Litre/second

  9. For a fluidised bed reactor, the most suitable/relevant model is a __________ model.

  10. A.
    tank in series
    B.
    bubbling bed
    C.
    plug flow
    D.
    none of these

  11. The rate at which a chemical substance reacts is proportional to its

  12. A.
    active mass
    B.
    molecular weight
    C.
    equivalent weight
    D.
    atomic weight

  13. In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants)

  14. A.
    A
    B.
    N
    C.
    A+N
    D.
    A-N

  15. Thermodynamic equilibrium constant in a system is affected by

  16. A.
    inerts
    B.
    pressure
    C.
    temperature
    D.
    all (a), (b) & (c)

  17. The most suitable reactor for carrying out an auto-thermal reaction is a

  18. A.
    batch reactor
    B.
    CSTR
    C.
    semi-batch reactor
    D.
    plug-flow reactor

  19. Which of the following chemical reactions will be favoured by low pressure ?

  20. A.
    2HI H2 + I2
    B.
    N2O2 2NO2
    C.
    N2 + O2 2NO
    D.
    none of these