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Chemical Engineering :: Chemical Reaction Engineering

  1. A plug-flow reactor is characterised by

  2. A.

     High capacity

    B.

     Presence of axial mixing

    C.

     Presence of lateral mixing

    D.

     Constant composition and temperature of reaction mixture


  3. Pick out the correct statement

  4. A.

     Reactions with high activation energies are very temperature sensitive

    B.

     Chemical equilibrium is a static state

    C.

     A photochemical reaction is catalysed by light

    D.

     A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction


  5. On application of pressure to the equilibrium system, ice ⇋ water; which of the following phenomenon will occur?

  6. A.

     Water will evaporate

    B.

     Equilibrium will not be attained

    C.

     More ice will be formed

    D.

     More water will be formed


  7. The excess energy of the reactants required to dissociate into products is known as the __________ energy.

  8. A.

     Thermal

    B.

     Activation

    C.

     Threshold

    D.

     Binding


  9. Radioactive decay follows __________ order kinetics.

  10. A.

     First

    B.

     Second

    C.

     Third

    D.

     Zero


  11. __________ is the response curve for a step input signal from a reactor.

  12. A.

     S-curve

    B.

     C-curve

    C.

     I-curve

    D.

     None of these


  13. The conversion in a mixed reactor/accomplishing a reaction A 3R is 50% when gaseous reactant 'A' is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is __________ second.

  14. A.

     0.5

    B.

     1

    C.

     2

    D.

     3


  15. Pick out the wrong statement.

  16. A.

     Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition

    B.

     Alumina is added as a promoter to iron catalyst in ammonia synthesis reaction

    C.

     Activation energy for a reaction is obtained from the intercept of the Ar-rhenious plot

    D.

     Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction


  17. Pick out the wrong statement.

  18. A.

     A catalyst does not alter the final position of equilibrium in a reversible reaction

    B.

     A catalyst initiates a reaction

    C.

     A catalyst is specific in reaction

    D.

     A catalyst remains unchanged in chemical composition at the end the reaction


  19. Pick out the wrong statement.

  20. A.

     A particular chemical reaction is more temperature sensitive at low temperatures

    B.

     A very high value of equilibrium constant, K (K >> 1) indicates that the reaction is practically irreversible in nature

    C.

     The intercept of the Arrhenious plot is called the 'activation energy'

    D.

     Non-ideal flow takes place in reactors due to recycling, channeling or by creation of stagnant regions