Half life period of a chemical reaction is proportional to CA0 -1, if the reaction is of _______________ order?
A. First
B. Zero
C. Second
D. Third
Month: February 2019
‘n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume________________?
‘n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume________________?
A. V/n
B. V
C. V.n
D. 1/V
The concentration of A in a first order reaction, A → B, decreases_____________________?
The concentration of A in a first order reaction, A → B, decreases_____________________?
A. Linearly with time
B. Exponentially with time
C. Very abruptly towards the end of the reaction
D. Logarithmically with time
Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about _______________ minutes?
Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about _______________ minutes?
A. 3
B. 4
C. 6
D. 10
A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by__________________?
A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by__________________?
A. Diffusion within the pellet
B. Reaction
C. External mass transfer
D. None of the above
The use of space time is preferred over the mean residence time in the design of a/an____________________?
The use of space time is preferred over the mean residence time in the design of a/an____________________?
A. Batch reactor
B. Ideal tubular-flow reactor
C. Slurry reactor
D. CSTR
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of ?
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of ?
A. Ideal plug flow
B. Bypass
C. Dead zone
D. Channelling
Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?
Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?
A. Proportional to
B. Independent of
C. Inversely proportional to
D. Proportional to the square of
Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?
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
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_______________?
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_______________?
A. CSTR of volume V
B. PFR of volume V
C. CSTR of volume V/X
D. PFR of volume V/X