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Chemical Engineering :: Chemical Reaction Engineering

  1. During manufacture of H2SO4, the oxidation of SO2 to SO3 by oxygen is an en-dothermic reaction. The yield of SO3 will be maximised, if the

  2. A.
    temperature is increased.
    B.
    pressure is reduced.
    C.
    temperature is increased and pressure is reduced.
    D.
    temperature is reduced and pressure is increased.

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  3. The role of a catalyst in a chemical reaction is to change the

  4. A.
    equilibrium constant
    B.
    activation energy
    C.
    final products
    D.
    heat of reaction

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  5. Molecularity of a reaction

  6. A.
    is always equal to the overall order of reaction.
    B.
    may not be equal to the order of reaction.
    C.
    can't have a fractional value.
    D.
    both (b) and (c).

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  7. BET apparatus is used to determine the

  8. A.
    specific surface of a porous catalyst.
    B.
    pore size distribution.
    C.
    pore diameter.
    D.
    porosity of the catalyst bed.

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  9. Carrier in a catalyst increases its

  10. A.
    surface area
    B.
    activity
    C.
    performance
    D.
    none of these

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  11. When the reaction is dominated by in-traparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as

  12. A.
    B.
    C.
    nD = n + 1
    D.
    none of these

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  13. When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.

  14. A.
    twice
    B.
    half
    C.
    equal
    D.
    none of these

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  15. An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will __________ with decrease in space time.

  16. A.
    increase
    B.
    increase exponentially
    C.
    decrease
    D.
    remain unchanged

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  17. An elementary liquid phase decomposition reaction is to be carried out in a CSTR. The design equation is

  18. A.
    kτ = XA/(1 - XA)
    B.
    kτ = XA(1 + XA)/(1 + XA)
    C.
    kτ = XA/(1 - XA)2
    D.

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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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