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Chemical Engineering :: Chemical Reaction Engineering

  1. If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.

  2. A.

     T ∝ 1/an

    B.

     T ∝ 1/an - 1

    C.

     T ∝ 1/an + 1

    D.

     T ∝ an


  3. In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for

  4. A.

     Fast reactions in catalyst of small pore diameter

    B.

     Fast reaction in catalyst of large pore diameter

    C.

     Slow reactions in catalyst of small pore diameter

    D.

     Slow reactions in catalyst of large pore diameter


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

  6. A.

     FA0/V - dCsub>A/dt

    B.

     FA0/V + dCsub>A/dt

    C.

     FA0/V . Xsub>A

    D.

     - dCsub>A/dt


  7. The catalyst in a second order reversible reaction increases the rate of the forward reaction

  8. A.

     And decreases that of backward reaction

    B.

     And backward reaction equally

    C.

     Only

    D.

     To a greater extent than that of the backward reaction


  9. A photochemical reaction is __________ light.

  10. A.

     Initiated by

    B.

     Accompanied with emission of

    C.

     Catalysed by

    D.

     Used to convert heat energy into


  11. The rate constant of a reaction is a function of the

  12. A.

     Time of reaction

    B.

     Temperature of the system

    C.

     Extent of reaction

    D.

     Initial concentration of the reactants


  13. With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will

  14. A.

     Increase

    B.

     Decrease

    C.

     Remain same

    D.

     Data in insufficient; can't be predicted


  15. The rate at which a chemical substance reacts is proportional to its

  16. A.

     Active mass

    B.

     Equivalent weight

    C.

     Molecular weight

    D.

     None of these


  17. The rate at which a chemical substance reacts is proportional to its

  18. A.

     Active mass

    B.

     Molecular weight

    C.

     Equivalent weight

    D.

     Atomic weight


  19. A first order reaction requires two equal sized CSTR. The conversion is

  20. A.

     Less when they are connected in series

    B.

     More when they are connected in series

    C.

     More when they are connected in parallel

    D.

     Same whether they are connected in series or in parallel