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Chemical Engineering :: Chemical Reaction Engineering

  1. In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

  2. A.

     Remain the same

    B.

     Be halved

    C.

     Also be doubled

    D.

     Become one fourth

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  3. The extent of a reaction is

  4. A.

     Different for reactants and products

    B.

     Dimensionless

    C.

     Depends on the stoichiometric co-efficient

    D.

     All of the above

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  5. The heat of reaction

  6. A.

     Depends on the pressure only

    B.

     Depends on the mechanism of reaction only

    C.

     Depends on both pressure and mechanism of reaction

    D.

     Is independent of the mechanism of reaction

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  7. For a homogeneous reaction of nth order, the dimension of the rate constant is given by

  8. A.

     L/(time)n

    B.

     (concentration)1 - n/(time)

    C.

     (concentration)n - 1/(time)

    D.

     None of these

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  9. For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single

  10. A.

     CSTR of volume V

    B.

     PFR of volume V

    C.

     CSTR of volume V/X

    D.

     PFR of volume V/X

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  11. For an autocatalytic reactor, the suitable reactor set up is

  12. A.

     P.F. reactors in series

    B.

     CSTR in series

    C.

     CSTR followed by P.F. reactor

    D.

     P.F. reactor followed by CSTR

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  13. __________ gas is normally employed in B.E.T.method of finding out the surface area of catalyst.

  14. A.

     N₂

    B.

     H₂

    C.

     CO₂

    D.

     He

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  15. If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is

  16. A.

     0

    B.

     1

    C.

     2

    D.

     3

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  17. When an exothermic reversible reaction is conducted adiabatically, the rate of reaction

  18. A.

     Continuously increases

    B.

     Continuously decreases

    C.

     Passes through a maximum

    D.

     Passes through a minimum

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  19. For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant

  20. A.

     Is independent of pressure

    B.

     Increases with pressure

    C.

     Decreases with pressure

    D.

     Increases /decreases with pressure depending on the stoichiometric co-efficients of the reaction

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