A. Less when they are connected in series
B. More when they are connected in series
C. More when they are connected in parallel
D. Same whether they are connected in series or in parallel
Related Mcqs:
- The conversion for a first order liquid phase reaction. A → B in a CSTR is 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be_____________________?
A. 60
B. 75
C. 90
D. 100 - For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min-1. What will be the conversion for a PFR with a space velocity of 0.2 min-1? Assume that all the other operating conditions are the same for CSTR and PFR ?
A. 0.15
B. 0.30
C. 0.60
D. 0.90 - A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?
A. Large reactor followed by smaller one
B. Smaller reactor followed by larger one
C. Either of the arrangement A. or B. will give the same yield
D. Data insufficient, can’t be predicted - Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?
A. 0
B. 1
C. 2
D. 3 - With the same reaction time, initial concentration and feed rate, the reaction 2A → B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be__________________?
A. Higher in P.F. reactor
B. Higher in CSTR
C. Same in both the reactors
D. Data insufficient; can’t be predicted - For identical flow rate, feed composition and for elementary first order reactions, ‘N’ equal sized mixed reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for constant density systems. This is true, when the value of ‘N’ is ___________________?
A. 1
B. > 1
C. ∞
D. ≥ 1 - For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is____________________?
A. 2
B. 4
C. 11
D. 22 - An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will__________________?
A. Be more in CSTR than in PFR
B. Be more in PFR than in CSTR
C. Be same in both cases
D. Depend on the temperature - 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?
A. Decrease
B. Increase
C. No change
D. Either A. or B., depends on the type of reaction - A first order homogeneous reaction of the type X → Y → Z (consecutive reaction) is carried out in a CSTR. Which of the following curves respectively show the variation of the concentration of X, Y and Z with time ?
A. I, II, III
B. III, II, I
C. III, I, II
D. II, III, I
