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Chemical Reaction Engineering - Section 6
Chemical Reaction Engineering - Section 7
Chemical Reaction Engineering - Section 8
Chemical Reaction Engineering - Section 9
Chemical Reaction Engineering - Section 10
Chemical Reaction Engineering - Section-11
  1. According to the 'law of mass action', the rate of reaction is directly proportional to the

    2. A.

     Equilibrium constant
    B.

     Volume of the reaction vessel
    C.

     Nature of the reactants
    D.

     Molar concentration of the reactants

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  2. What is the dispersion number for a CSTR?

    3. A.

     0
    B.

     1
    C.

     < 1
    D.

     ∞

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  3. For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by

    4. A.

     A dirac delta function
    B.

     A step function
    C.

     A ramp function
    D.

     None of the above

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  4. Mean residence time is equal to the space time, when

    5. A.

     The feed rate is measured at temperature and pressure in the reactor
    B.

     The temperature, pressure and the density of reaction mixture remains constant throughout the reactor
    C.

     There is no change in number of moles in gaseous reaction
    D.

     All of the above

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  5. A space time of 3 hours for a flow reactor means that

    6. A.

     The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours
    B.

     Three reactor volumes of feed can be processed every hour
    C.

     It takes three hours to dump the entire volume of the reactor with feed
    D.

     Conversion is cent per cent after three hours

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  6. Which of the following will give maximum gas conversion?

    7. A.

     Fixed bed reactor
    B.

     Fluidised bed reactor
    C.

     Semi-fluidised bed reactor
    D.

     Plug-flow catalytic reactor

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  7. For the same residence time, which one will give the maximum conversion?

    8. A.

     Single stirred tank (v = 5 litres)
    B.

     Two stirred tank (each of 2.5 litres) in series
    C.

     Stirred tank followed by tubular flow reactor (each of 2.5 litres)
    D.

     Single tubular flow reactor (v = 5 litres)

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  8. The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

    9. A.

     0.875
    B.

     0.5
    C.

     0.425
    D.

     Data insufficient to calculate

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  9. A typical example of an exothermic reversible reaction conducted at high pressure in industry is

    10. A.

     Dehydration of ethanol
    B.

     Methanol synthesis
    C.

     Reformation of methane
    D.

     Polymerisation of ethylene

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  10. Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion.

    11. A.

     Decrease
    B.

     Increase
    C.

     No change
    D.

     Either A or B, depends on the type of reaction

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