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Chemical Engineering :: Chemical Reaction Engineering

  1. The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are

  2. A.
    always irreversible.
    B.
    insensitive to temperature changes.
    C.
    mostly irreversible.
    D.
    highly temperature sensitive.

  3. From collison theory, the reaction rate constant is proportional to

  4. A.
    B.
    C.
    T
    D.

  5. For a mixed flow reactor operating at steady state, the rate of reaction is given by


  6. Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the

  7. A.
    activation energy
    B.
    equilibrium constant
    C.
    heat of reaction
    D.
    none of these

  8. In Langmuir treatment of adsorption,

  9. A.
    whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule.
    B.
    whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site.
    C.
    all the adsorption does not take place by the same mechanism.
    D.
    extent of adsorption is more than one complete monomolecular layer on the surface.

  10. Organic catalysts differ from the inorganic catalyst in the sense that the former is

  11. A.
    active at cryogenic temperatures only.
    B.
    prohibitively costly.
    C.
    proteinous in nature.
    D.
    active at very high temperature only.

  12. An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction

  13. A.
    is maximum at the inlet of the reactor.
    B.
    goes through a maximum along the length of the reactor.
    C.
    goes through a minimum along the length of the reactor.
    D.
    is maximum at the exit of the reactor.

  14. Pick out the wrong statement.

  15. A.
    Exit age description function (E) and internal age distribution function (I) are related as, .
    B.
    Chmisorption studies are useful in the determination of catalyst surface area and pore size distribution.
    C.
    A higher temperature favours the reaction of higher activation energy.
    D.
    A catalyst increases the potential energy barrier over which the reactants must pass to form products.

  16. An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is

  17. A.
    maximum at the inlet of the reactor.
    B.
    maximum at the exit of the reactor.
    C.
    maximum at the centre of the reactor.
    D.
    constant throughout the reactor.

  18. Equilibrium of a chemical reaction as viewed by kinetics is a __________ state.

  19. A.
    dynamic steady
    B.
    static steady
    C.
    dynamic unsteady
    D.
    none of these