Which of the following will give maximum gas conversion ?

Related Mcqs:

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

   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)

2. The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is___________________?

   A. 0.5
   B. -0.5
   C. 1
   D. 1.5

3. The fractional volume change of the system for the isothermal gas phase reaction, A → 3B, between no conversion and complete conversion is___________________?

   A. 0.5
   B. 1
   C. 2
   D. 3

4. The following gas phase reaction is taking place in a plug flow reactor. A stoichiometric mixture of A and B at 300 K is fed to the reactor. At 1 m along the length of the reactor, the temperature is 360 K. The pressure drop is negligible and an ideal gas behaviour can be assumed. Identify the correct expression relating the concentration of A at the inlet (CA0), concentration of A at 1m (CA) and the corresponding conversion of A (X) ?

   A. CA = 1.2 CA0 (1 – X)/(1 – 0.33X)
   B. CA = 1.2 CA0 (1 – X)/(1 – 0.5X)
   C. CA = 0.83 CA0 (1 – X)/(1 – 0.33X)
   D. CA = 0.83 CA0 (1 – X)/(1 – 0.5X)

5. 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

6. A liquid phase reaction is to be carried out under isothermal conditions. The reaction rate as a function of conversion has been determined experimentally and is shown in the figure given below. What choice of reactor or combination of reactors will require the minimum overall reactor volume, if a conversion of 0.9 is desired ?

   A. CSTR followed by a PFR
   B. PFR followed by a CSTR
   C. CSTR followed by a PFR followed by a CSTR
   D. PFR followed by a CSTR followed by a PFR

7. 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

8. 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

9. The first order gas phase reaction as shown in the bellow figure is conducted isothermally in batch mode. The rate of change of conversion with time is given by________________?

   A. dXA/dt = k1 (1 – XA)2 (1 + 2XA)
   B. dXA/dt = k1 (1 – XA) (1 + 0.5XA)
   C. dXA/dt = k1 (1 – XA)
   D. dXA/dt = k1 (1 – XA)/(1 + XA)

10. The gas phase reaction 2A ⇌ B is carried out in an isothermal plug flow reactor. The feed consists of 80 mole % A and 20 mole % inerts. If the conversion of A at the reactor exit is 50%, then CA/CA0 at the outlet of the reactor is _______________________?

    A. 2/3
    B. 5/8
    C. 1/3
    D. 3/8