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Chemical Engineering :: Chemical Reaction Engineering

  1. A batch reactor is suitable for

  2. A.

     Achieving cent percent conversion of reactants into products

    B.

     Large scale gaseous phase reactions

    C.

     Liquid phase reactions

    D.

     Obtaining uniform polymerisation products in highly exothermic reactions


  3. If Thiele modulus is __________ , then the pore diffusion resistance in a catalyst may be considered as negligible.

  4. A.

     0

    B.

     ∞

    C.

     < 0.5

    D.

     > 0.5


  5. Which of the following chemical reactions will be favoured by low pressure ?

  6. A.

     2HI ⇋ H₂ + I₂

    B.

     N₂O₂ ⇋ 2NO₂

    C.

     N₂ + O₂ ⇋ 2NO

    D.

     None of these


  7. A trickle bed reactor is the one, which

  8. A.

     Has altogether three streams either entering or leaving

    B.

     Processes three reactants at different flow rates

    C.

     Processes three reactants with same flow rate

    D.

     Employs all the three phases (i.e.. .solid, liquid and gas)


  9. Study of chemical kinetics is the easiest in the case of __________ reactions.

  10. A.

     Irreversible

    B.

     Reversible

    C.

     Surface

    D.

     Side


  11. The catalyst in a first order chemical reaction changes the

  12. A.

     Equilibrium constant

    B.

     Activation energy

    C.

     Heat of formation of the product

    D.

     Heat of reaction


  13. Limiting reactant in a chemical reaction decides the

  14. A.

     Rate constant

    B.

     Conversion

    C.

     Reaction speed

    D.

     Equilibrium constant


  15. In an exothermic chemical reaction, the reactants compared to the products have

  16. A.

     Higher temperature

    B.

     More energy

    C.

     Less energy

    D.

     Same energy


  17. An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the

  18. A.

     0.80

    B.

     1.33

    C.

     1.60

    D.

     2.67


  19. The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

  20. A.

     D

    B.

     √d

    C.

     D1.5

    D.

     D2