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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

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  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)

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  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.

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  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

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  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

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  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

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  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

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  15. Thermodynamic equilibrium constant in a system is affected by

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

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  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

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  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

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