Chemical Engineering — Test 91
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Question 1
Half life period of decomposition of a liquid ‘A’ by irreversible first order reaction is 12 minutes. The time required for 75% conversion of ‘A’ is _____________ minutes?
Question 2
The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇌ Y, in which the _____________________?
Question 3
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_______________?
Question 4
Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?
Question 5
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?
Question 6
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of ?
Question 7
The use of space time is preferred over the mean residence time in the design of a/an____________________?
Question 8
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__________________?
Question 9
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?
Question 10
The concentration of A in a first order reaction, A → B, decreases_____________________?