In an exothermic chemical reaction, the reactants compared to the products have

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Question
In an exothermic chemical reaction, the reactants compared to the products have
Options
A. higher temperature
B. more energy
C. less energy
D. same energy.

Correct Answer

more energy

Chemical Reaction Engineering problems

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1. 'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
Options
A. pressure
B. temperature
C. both (a) & (b)
D. neither (a) nor (b)

4. A catalyst loses its activity due to
Options
A. loss in surface area of the active component.
B. agglomeration of metal particles caused by thermal sintering of the solid surface.
C. covering of the catalytic active sites by a foregin substance.
D. all (a), (b) and (c).

5. For a zero order chemical reaction, the
Options
A. half life period is directly proportion to the initial concentration of the reac-tants.
B. plot of products concentration with time is a straight line through the origin.
C. products concentration increases linerarly with time.
D. all (a), (b) and (c).

8. For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
Options
A. fixed
B. fluidised bed reactor followed by a fixed
C. fixed bed reactor followed by a fluidised
D. fluidised

10. Pick out the wrong statement pertaining to space velocity of flow reactors.
Options
A. The unit of space velocity is (time)^-1 .
B. The space velocity of 3 hr^-1 means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour.
C. The space velocity of 3 hr^-1 means that one third reactor volume of feed at specified conditions are being fed into the reactor.
D. none of these.

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