A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0 = 5 kmole/m3 ; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1 ; (ΔH) = -40 kJ/mole; ρ = 1000 kg/m3 CP = 4 J/gm.°C; q = 10-3 m3 /min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is
A. 3 2
B. 1 kW
C. 3 5
D. 4 kW
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In an exothermic reaction, the energy of the reacting substances as compared to that of products is
A. More
B. Less
C. Same
D. Either A or B, depends on order of reaction
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Reaction rate of a first order reaction, which is half completed in 23 minutes will be
A. 0.03 sec-1
B. 0.03 min-1
C. 0.03 hr-1
D. 0.05 min-1
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The effect of increasing pressure on the gaseous equilibrium of the reaction 2X+3Y ⇋ 3X+2Y indicates that
A. Pressure has no effect
B. Backward reaction is favoured
C. Forward reaction is favoured
D. None of these
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For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to Cp n , then what is the value of 'n' for this chemical reaction
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The percent conversion of ethanol in the reactor is
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Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.
A. Increases
B. Remains unchanged
C. Decreases
D. Unpredictable from the data
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Rate constant 'k' and absolute temperature 'T' are related by collision theory (for bimolecular) as
A. k ∝ T1.5
B. k ∝ exp(-E/RT)
C. D. k ∝ T
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The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is
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Vegetable oils are hydrogenated in a __________ reactor.
A. Slurry
B. Plug flow
C. Homogeneous catalytic
D. None of these
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Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature?
A. Time
B. Useful volume of the tank
C. Diameter of the reactor
D. None of these
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A reaction which is catalysed by a base is catalysed by all substances which have a tendency to
A. Lose a proton
B. Gain a proton
C. Gain an electron
D. None of these
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In a/an __________ vessel, the fluid enters and leaves following plug flow.
A. Open
B. Closed
C. Open-closed
D. Close-opened
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In the fluid catalytic cracker (FCC), the cracking reaction is __________ (i) and the regeneration is ____________ (ii)
A. (i) exothermic (ii) endothermic
B. (i) exothermic (ii) exothermic
C. (i) endothermic (ii) enodthermic
D. (i) endothermic (ii) exothermic
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__________ explains the mechanism of catalysis.
A. Activated complex theory
B. Collision theory
C. Thermodynamics
D. None of these
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B.E.T. method of finding out surface area of a catalyst, uses the extension of __________ isotherm.
A. Langmuir
B. Freundlich
C. Tempkin
D. None of these
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Specific rate constant for a second order reaction
A. Is independent of temperature
B. Varies with temperature
C. Depends on the nature of the reactants
D. Both B and C
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According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction
A. B. K ∝ e − Rt E
C. K ∝ T e − Rt E
D. None of these
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Collision theory gives the rate constant for bimolecular reaction as
A. B. K α e RT E
C. K α e − RT E
D. None of these
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The vessel dispersion number (D/μL) for plug flow is
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