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Chemical Engineering :: Chemical Reaction Engineering

  1. In Langmuir treatment of adsorption,

  2. A.

     Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule

    B.

     Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site

    C.

     All the adsorption does not take place by the same mechanism

    D.

     Extent of adsorption is more than one complete monomolecular layer on the surface


  3. If CA is the quantity of reactants initially present, the quantity left after 'n' half periods will be equal to

  4. A.

     (CA)n

    B.

     (1/2)n.CA

    C.

     (CA)1/n

    D.

     (CA)1/2n


  5. Pick out the correct statement.

  6. A.

     A catalyst does not change AH of the reaction

    B.

     A catalyst changes the equilibrium point

    C.

     Law of mass action was suggested by Le-Chatelier

    D.

     The difference between the energy of reactants and that of the products is the activation energy


  7. Cold shot cooling is only practical when the feed temperature is __________ than the reaction temperature.

  8. A.

     Higher

    B.

     Much higher

    C.

     Lower

    D.

     Much lower


  9. With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.

  10. A.

     Increases

    B.

     Decreases

    C.

     Remains unaffected

    D.

     Unpredictable from the data


  11. The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

  12. A.

     More than

    B.

     Less than

    C.

     Equal to

    D.

     Either B or C


  13. An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is

  14. A.

     Maximum at the inlet of the reactor

    B.

     Maximum at the exit of the reactor

    C.

     Maximum at the centre of the reactor

    D.

     Constant throughout the reactor


  15. In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO₂ to SO₃ is accomplished by a __________ reaction.

  16. A.

     Non-catalytic homogeneous

    B.

     Non-catalytic heterogeneous

    C.

     Catalytic homogenous

    D.

     Catalytic heterogeneous


  17. For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to Cxn, then what is the value of 'n' ?

  18. A.

     4

    B.

     1/4

    C.

     16

    D.

     2


  19. Pick out the wrong statement.

  20. A.

     Visible radiation provides the necessary activation energy in photochemical reactions

    B.

     The order and molecularity of a complex reaction may not be the same

    C.

     For a second order reaction, the slope of the graph/plot between rate and (concentration) is equal to the rate constant (k)

    D.

     Molecularity of the reaction is always a whole number greater than zero