Home / Chemical Engineering / Chemical Reaction Engineering :: Section 9

Chemical Engineering :: Chemical Reaction Engineering

  1. The following half life data are available for the irreversible liquid phase reaction A products.

    The overall order of reaction is

  2. A.
    0.5
    B.
    1
    C.
    1.5
    D.
    2

  3. A non-catalytic chemical reaction of the type is called a __________ reaction.

  4. A.
    parallel
    B.
    series
    C.
    series-parallel
    D.
    none of these

  5. The unit of frequency factor in Arhenious equation is

  6. A.
    same as that of rate constant.
    B.
    same as that of activation energy.
    C.
    dimensionless.
    D.
    none of these.

  7. With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)

  8. A.
    increases
    B.
    decreases
    C.
    remains same
    D.
    increases linearly

  9. Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction.

  10. A.
    elementary
    B.
    parallel
    C.
    consecutive
    D.
    none of these

  11. The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are

  12. A.
    2 & 1
    B.
    11 & 2
    C.
    2 && 2
    D.
    1 & 1

  13. The irreversible reaction is a special case of reversible reaction, if the

  14. A.
    equilibrium constant is 1.
    B.
    conversion of the reactant at equilibrium condition is zero.
    C.
    reactant concentration at equilibrium condition is zero.
    D.
    all (a), (b) and (c).

  15. A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3 . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m3 , the volume of the mixed flow reactor should be increased by a factor of

  16. A.
    7
    B.
    6
    C.
    3
    D.
    7/3

  17. For the liquid phase parallel reactions:
    R, rR = K1.CA2; E1 = 80 KJ/mole
    S, rs = K1.CA ; E2 = 120 KJ/mole
    The desired product is R. A higher selectivity of R will be achieved, if the reaction is conducted at

  18. A.
    low temperature in a CSTR.
    B.
    high temperature in a CSTR.
    C.
    low temperature in a PFR.
    D.
    high temperature in a PFR.

  19. In an ideal mixed reactor (at steady state), the

  20. A.
    space time is equivalent to holding time for constant density systems.
    B.
    composition throughout the reactor remains same.
    C.
    exit stream has the same composition as the fluid within the reactor.
    D.
    all (a), (b) and (c).