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Chemical Engineering :: Chemical Reaction Engineering

  1. 6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO₂ and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant?

  2. A.

     100%

    B.

     95%

    C.

     75%

    D.

     20%


  3. Signal normally used to study non-ideal flow by stimulus response technique is __________ input.

  4. A.

     Pulse

    B.

     Step

    C.

     Both A & B

    D.

     Neither A nor B


  5. If in the gaseous phase reaction, N₂O₄ ⇋ 2NO₂, x is the part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be

  6. A.

     (1 + x)

    B.

     (1 - x)

    C.

     (1 + x)²

    D.

     (1 - x)²


  7. Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.

  8. A.

     Mixed

    B.

     Integral (plug flow)

    C.

     Differential (flow)

    D.

     Either A, B and C


  9. Fluidised bed reactor is characterised by

  10. A.

     Uniformity of temperature

    B.

     Comparatively smaller equipment

    C.

     Very small pressure drop

    D.

     Absence of continuous catalyst regeneration facility


  11. At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

  12. A.

     1.6

    B.

     2

    C.

     2.24

    D.

     2.5


  13. If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is

  14. A.

     Not feasible

    B.

     Just feasible

    C.

     Very much feasible

    D.

     Unpredictable as ΔG is no measure of feasibility of a reaction


  15. Transition state theory relates the above quantities as

  16. A.

     K ∝ e-E/RT

    B.

     K ∝ T.eE/RT

    C.

     K ∝ √T

    D.

     K ∝ T1.5


  17. Velocity of a chemical reaction

  18. A.

     Decreases with increase in temperature

    B.

     Increases with increase of pressure of reactants for all reactions

    C.

     Decreases with increase of reactant concentration

    D.

     None of these


  19. Which of the following will favour the reverse reaction in a chemical equilibrium reaction?

  20. A.

     Increasing the concentration of one of the reactants

    B.

     Increasing the concentration of one or more of the products

    C.

     Removal of at least one of the products at regular interval

    D.

     None of these