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Chemical Engineering :: Chemical Reaction Engineering

  1. Catalyst is a substance, which __________ chemical reaction.

  2. A.
    increases the speed of a
    B.
    decreases the speed of a
    C.
    can either increase or decrease the speed of a
    D.
    alters the value of equilibrium constant in a reversible

  3. The residence time distribution of an ideal CSTR is

  4. A.
    B.
    τ exp (-t/τ)
    C.
    exp(-t/τ)
    D.

  5. A rise in temperature

  6. A.
    normally tends to increase the reaction rate.
    B.
    does not affect a catalysed reaction.
    C.
    does not affect photo-chemical reaction rates.
    D.
    all (a), (b) and (c).

  7. The enzyme which can catalyse the conversion of glucose to ethyl alcohol is

  8. A.
    invertase
    B.
    maltase
    C.
    diastase
    D.
    zymase

  9. For reaction, P + 2 3R, molar rate of consumption of P is

  10. A.
    double of that of Q.
    B.
    same as that of Q.
    C.
    half of that of Q.
    D.
    2/3rd of that of Q.

  11. If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst

  12. A.
    porosity is very important.
    B.
    porosity is of less importance.
    C.
    internal surface area is utilised efficiently.
    D.
    none of these.

  13. The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

  14. A.
    0.875
    B.
    0.5
    C.
    0.425
    D.
    data insufficient to calculate

  15. In case of unimolecular type elementary reaction, , plug flow reactor as compared to mixed reactor is

  16. A.
    more
    B.
    same
    C.
    less
    D.
    unpredictable

  17. What is the value of 'n' if the reaction rate of the chemical reaction A B, is proportional to CAn and it is found that the reaction rate triples, when the concentration of 'A' is increased 9 times ?

  18. A.
    1/2
    B.
    1/3
    C.
    1/9
    D.
    3

  19. The first order series reaction is conducted in a batch reactor. The initial concentrations of A, B and C (CA0, CB0, CC0 respectively) are all non-zero. The variation of CB with reaction time will not show a maximum, if

  20. A.
    k2 CB0 > k1 CA0
    B.
    k CA0 > k2.CB0
    C.
    CB0 > CA0
    D.
    CA0 > CB0