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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

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  3. The residence time distribution of an ideal CSTR is

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

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  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).

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

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

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  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.

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  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.

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  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

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  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

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  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

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  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

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